Deck 2: The Biological Perspective

Question 1

The point at which the nerves from the left side of the body cross over into the right side of the brain, and vice versa, is the ________.

A) reticular activating system
B) pons
C) medulla
D) cerebellum

Answer 1

C

Question 2

The two main divisions of the nervous system are the ________ and ________.

A) brain; spinal cord
B) autonomic; somatic nervous systems
C) peripheral nervous system; central nervous system
D) glands; muscles

Answer 2

C

Question 3

Which of the following is the upper part of the brain consisting of two cerebral hemispheres and the structures that connect them?

A) occipital lobe
B) cerebrum
C) corpus callosum
D) cerebellum
Chapter 2 - Quick Quiz 2

Answer 3

B

Question 4

A brain-imaging method using radio waves and magnetic fields of the body to produce detailed images of the brain is called ________.

A) magnetic resonance imaging (MRI)
B) electroencephalography (EEG)
C) positron-emission tomography (PET)
D) computerized axial tomography (CT)

Question 5

Which endocrine gland controls all of the other endocrine glands?

A) thyroid
B) adrenal
C) thymus
D) pituitary

Question 6

Which of the following is a function of the right hemisphere?

A) perception, expression of emotion, and recognition of patterns
B) sense of time and rhythm
C) speech, handwriting, and calculation
D) language processing in most individuals
Chapter 2 - Quick Quiz 1

Question 7

________ plays a critical role as a neurotransmitter that stimulates skeletal muscles to contract.

A) acetylcholine
B) GABA
C) Dopamine
D) Endorphin

Question 8

Which part of the nervous system takes the information received from the senses, makes sense out of it, makes decisions, and sends commands out to the muscles and the rest of the body?

A) spinal cord
B) brain
C) reflexes
D) interneurons

Question 9

The part of the autonomic nervous system that is responsible for reacting to stressful events and bodily arousal is called the ________ nervous system.

A) central
B) somatic
C) sympathetic
D) parasympathetic

Question 10

Which of the following is the section of the brain located at the rear and bottom of each cerebral hemisphere and contains the visual centers of the brain?

A) occipital lobe
B) parietal lobe
C) temporal lobe
D) frontal lobe

Question 11

The hormone released by the pineal gland that reduces body temperature and prepares you for sleep is ________.

A) melatonin
B) DHEA
C) parathormone
D) thyroxin

Question 12

The area of the frontal lobe that is devoted to the production of fluent speech is ________ area.

A) Broca's
B) Gall's
C) Wernicke's
D) Korsakoff's

Question 13

Which of the following are tiny sacs in a synaptic knob that release chemicals into the synapse?

A) synaptic vesicles
B) synaptic nodes
C) terminal buttons
D) synaptic gaps

Question 14

Which part of the neuron is responsible for maintaining the life of the cell?

A) axon
B) soma
C) dendrite
D) cell membrane

Question 15

Which of the following are responsible for acting as a facilitator of communication between neurons?

A) motor neurons
B) interneurons
C) sensory neurons
D) reflexes

Question 16

Every deliberate action you make, such as pedaling a bike, walking, scratching, or smelling a flower, involves neurons in the ________ nervous system.

A) sympathetic
B) somatic
C) parasympathetic
D) autonomic

Question 17

Signals from the neurons of which sense are NOT sent to the cortex by the thalamus?

A) hearing
B) smell
C) taste
D) vision

Question 18

Which of the following regions contains the primary visual cortex?

A) frontal lobe
B) parietal lobe
C) temporal lobe
D) occipital lobe

Question 19

The branchlike structures that receive messages from other neurons are called ________.

A) axons
B) nerve bundles
C) dendrites
D) synapses

Question 20

What part of the brain acts as a relay station for incoming sensory information?

A) hypothalamus
B) thalamus
C) cerebellum
D) pituitary gland

Question 21

Which part of a neuron is attached to the soma and carries messages out to other cells?

A) soma
B) axon Correct. The axon carries messages to other cells.
C) dendrite Incorrect. Dendrites receive messages.
D) cell membrane TOPIC: Neurons and Nerves: Building the Network

Question 22

The function of the neuron's axon is to ________.

A) carry messages to other cells Correct. The function of the axon is to carry messages to other cells.
B) regulate the neuron's life processes
C) receive messages from neighboring neurons Incorrect. Dendrites, not axons, receive messages.
D) insulate against leakage of electrical impulses TOPIC: Neurons and Nerves: Building the Network

Question 23

The part of the neuron whose name literally means "branch" is ________.

A) axon Incorrect. Dendrite is the correct answer.
B) dendrite Correct. Dendrite comes from the word tree.
C) myelin
D) soma TOPIC: Neurons and Nerves: Building the Network

Question 24

A ________.

A) glial cell Incorrect. Glial cells serve as a structure for neurons.
B) neuron Correct. A neuron is a specialized cell that makes up the nervous system that receives and sends messages within
That system.
C) cell body
D) myelin sheath TOPIC: Neurons and Nerves: Building the Network

Question 25

The branch of neuroscience that focuses on the biological bases of psychological processes, behavior, and learning is called ________.

A) biological psychology Correct. This is the branch of neuroscience that covers these topics.
B) bioscience Incorrect. The correct answer is biological psychology, which is also called behavioral neuroscience.
C) brain scientology
D) neurostemology TOPIC: Neurons and Nerves: Building the Network

Question 26

Dendrite is to axon as:

A) send is to receive. Incorrect. This is the opposite of the correct answer.
B) send is to regulate.
C) receive is to send. Correct. Dendrites are treelike parts of the neuron that are designed to receive messages. The axon sends messages to other neurons.
D) receive is to release. TOPIC: Neurons and Nerves: Building the Network

Question 27

________ receive messages from other neurons and ________ send messages to other neurons.

A) Axons; dendrites Incorrect. Axons send messages, and dendrites receive messages.
B) Axon; soma
C) Soma; glial cells
D) Dendrites; axons Correct. Dendrites receive messages, and axons carry messages to other cells.
TOPIC: Neurons and Nerves: Building the Network

Question 28

The nervous system is defined as________.

A) a complex network of cells that carries information to and from all parts of the body Correct. The nervous system is a complex network of cells that carry information to and from all parts of the body.
B) a specialized cell that makes up the brain and nervous system
C) all nerves and neurons that are not contained in the brain and spinal cord but that run throughout the body itself Incorrect. The nervous system includes networks of neurons that are in the brain and spinal cord.
D) a gland located in the brain that secretes human growth hormone TOPIC: Neurons and Nerves: Building the Network

Question 29

What is the term used to describe the bulbs located at the end of the axon?

A) axon terminals Correct. The axon terminals are located at the end of the axon.
B) synaptic vesicles Incorrect. Synaptic vesicles are structures within the synaptic knobs.
C) synapses
D) receptor sites TOPIC: Neurons and Nerves: Building the Network

Question 30

What are two roles of glial cells?

A) acting as insulation and providing structure to surrounding neurons Correct. This answer defines two roles of glial cells.
B) shaping cells and moving new neurons into place Incorrect. Glial cells provide structure and insulation to neurons.
C) regulating metabolic activity and serving as pain detectors
D) monitoring neural transmission and releasing hormones in the brain TOPIC: Neurons and Nerves: Building the Network

Question 31

Which of the following BEST represents the order in which a neuron receives and transmits information?

A) dendrites, cell body, axon, axon terminals Correct. The dendrite receives a message, the cell body processes it, the axon takes a message to the axon terminals, and the terminal buttons release neurotransmitters.
B) axon terminals, dendrites, cell body, axon
C) cell body, dendrites, axon terminals, axon Incorrect. Every part of this answer is out of the correct order.
D) axon, cell body, dendrites, axon terminals TOPIC: Neurons and Nerves: Building the Network

Question 32

What is the term used to describe the rounded areas on the ends of the axon terminals?

A) synaptic vesicles Incorrect. Synaptic vesicles are structures within the synaptic knobs.
B) axons
C) dendrites
D) synaptic knobs Correct. Synaptic knobs are located at the tip of each axon terminal.
TOPIC: Neurons and Nerves: Building the Network

Question 33

The function of the ________ is to carry information to and from all parts of the body.

A) soma Incorrect. The primary responsibility of the soma is to maintain the life of the neuron.
B) synapse
C) nervous system Correct. Sending information to and from all parts of the body is the primary function of the nervous system.
D) endorphins TOPIC: Neurons and Nerves: Building the Network

Question 34

Your teacher asks you to describe the sequence of parts of a neuron that the impulse travels during neural conduction. Which of the following sequences will you offer?

A) dendrites, axon, soma, synaptic knob
B) terminal buttons, axon, soma, dendrites
C) axon, soma, dendrites, synaptic knob Incorrect. The neural impulse begins with the receipt of messages from the dendrites.
D) dendrites, soma, axon, synaptic knob Correct. This answer describes the correct sequence.
TOPIC: Neurons and Nerves: Building the Network

Question 35

The branchlike structures that receive messages from other neurons are called ________.

A) axons Incorrect. Axons send but do not receive messages.
B) nerve bundles
C) dendrites Correct. Dendrites receive messages from other neurons.
D) synapses TOPIC: Neurons and Nerves: Building the Network

Question 36

The branch of life sciences which involves the structure and function of the brain and nervous system is called ________.

A) neuroscience Correct. This is the branch of life sciences that covers these topics.
B) bioscience Incorrect. The correct answer is neuroscience.
C) brain scientology
D) neurostemology TOPIC: Neurons and Nerves: Building the Network

Question 37

By what other name is a soma called?

A) axon
B) cell body Correct. The soma is also called the cell body.
C) dendrite
D) cell membrane Incorrect. The soma is also called the cell body.
TOPIC: Neurons and Nerves: Building the Network

Question 38

Which part of the neuron is responsible for maintaining the life of the cell?

A) axon
B) soma Correct. The soma is responsible for maintaining the life of the cell.
C) dendrite
D) cell membrane Incorrect. The soma is responsible for maintaining the life of the cell.
TOPIC: Neurons and Nerves: Building the Network

Question 39

The part of a neuron that contains the nucleus and keeps the entire cell alive and functioning is the ________.

A) axon
B) cell membrane Incorrect. The soma is responsible for maintaining the life of the cell.
C) dendrite
D) soma Correct. The soma is responsible for maintaining the life of the cell.
TOPIC: Neurons and Nerves: Building the Network

Question 40

A cell in the human nervous system whose primary function is to provide insulation and structure for neurons on which they may develop and work is called a(n) ________.

A) epidermal cell
B) adipose cell
C) glial cell Correct. Glial cells serve as a structure on which neurons develop and work.
D) myelin sheath Incorrect. The myelin sheath does not serve as a structure on which neurons develop and work.
TOPIC: Neurons and Nerves: Building the Network

Question 41

The saclike structures found inside the synaptic knob containing chemicals are called ________.

A) axon terminals Incorrect. The axon terminals are limb-like structures.
B) synapses
C) synaptic vesicles Correct. Synaptic vesicles are structures within the synaptic knobs.
D) receptor sites TOPIC: Neurons and Nerves: Building the Network

Question 42

During action potential, the electrical charge inside the neuron is ________ the electrical charge outside the neuron.

A) positive compared to Correct. There are more positively charged ions inside the cell than outside.
B) larger than
C) negative compared to Incorrect. During resting potential, the inside is more negatively charged.
D) smaller than TOPIC: Neurons and Nerves: Building the Network

Question 43

What is the function of myelin?

A) to serve as a structure for neurons Incorrect. This is the function of glial cells, not myelin.
B) to monitor neural activity
C) to speed up the neural impulse Correct. Myelin speeds up the neural impulse.
D) to produce neurotransmitters TOPIC: Neurons and Nerves: Building the Network

Question 44

The charge that a neuron at rest maintains is due to the presence of a high number of ________ charged ions inside the neuron's membrane.

A) actively
B) passively
C) negatively Correct. Negatively charged ions inside the neuron's membrane are what give rise to a negative resting potential.
D) positively Incorrect. It is during the action potential that the positively charged ions flow into the neuron and outnumber the negatively charged ions.
TOPIC: Neurons and Nerves: Building the Network

Question 45

Which of the following are tiny sacs in an axon terminal that release chemicals into the synapse?

A) synaptic vesicles Correct. Synaptic vesicles are structures within the synaptic knobs.
B) synaptic nodes
C) terminal buttons Incorrect. Terminal buttons are the same as synaptic knobs.
D) synaptic gaps TOPIC: Neurons and Nerves: Building the Network

Question 46

What do we call the state of a neuron when it is NOT firing a neural impulse?

A) action potential Incorrect. Action potential is the state a neuron is in when firing a neural impulse.
B) resting potential Correct. Resting potential is the state a neuron is in when not firing a neural impulse.
C) myelination signal
D) transmission impulse TOPIC: Neurons and Nerves: Building the Network

Question 47

The fluid-filled space between the synaptic knob of one cell and the dendrites of the next cell is called the ________.

A) receptor site Incorrect. Molecules that float across the synapse fit themselves into receptor sites, thus activating the next cell.
B) synapse Correct. The synapse is the space between the axon of a sending neuron and the dendrites of a receiving neuron.
C) synaptic knob
D) axon terminal TOPIC: Neurons and Nerves: Building the Network

Question 48

When the electrical potential in a cell is in action versus a resting state, this electrical charge reversal is known as the ________.

A) resting potential Incorrect. This would be when a cell continued to be at rest.
B) excitation reaction
C) action potential Correct. This is the state where the electrical charge is reversed.
D) permeable reaction TOPIC: Neurons and Nerves: Building the Network

Question 49

The term "fire" when referring to neural transmission indicates that a neuron:

A) has become less positive in charge.
B) has received, in its dendrites, appropriate inputs from other neurons. Correct. A neuron fires after the dendrites receive enough stimulation to trigger the cell body to generate an action potential.
C) is unable to transmit information to another neuron.
D) has become more negative in charge. Incorrect. In fact, the firing state of the neuron occurs when it generates a positive charge rather than a negative charge.
TOPIC: Neurons and Nerves: Building the Network

Question 50

A nerve is a group of ________ bundled together.

A) axons Correct. Nerves are bundles of myelin-coated axons.
B) interneurons
C) dendrites Incorrect. Dendrites are part of the neuron.
D) glial cells TOPIC: Neurons and Nerves: Building the Network

Question 51

Two specialized types of glial cells are called ________ and ________.

A) occipital; lobitical
B) oligodendrocytes; Schwann cells Correct. These are the two types according to the text.
C) occipital; Schwann Incorrect. B is the correct answer.
D) oligodendrocytes; lobitical TOPIC: Neurons and Nerves: Building the Network

Question 52

The action potential causes neurotransmitters to be released into the ________.

A) myelin sheath
B) axon
C) synapse Correct. Neurotransmitters are released into the synapse.
D) synaptic vesicle Incorrect. Neurotransmitters are stored in the synaptic vesicle.
TOPIC: Neurons and Nerves: Building the Network

Question 53

When a neuron fires, it fires in a(n) ________ fashion, as there is no such thing as "partial" firing.

A) all-or-none Correct. This is the term used to describe how neurons fire according to the book.
B) rapid fire
C) accidental patterned
D) quick successioned Incorrect. This is not the term referred to in the book.
TOPIC: Neurons and Nerves: Building the Network

Question 54

When a cell is "at rest," it is in a state called the ________.

A) stopping point
B) obcipitation junction Incorrect. This is a fictitious word.
C) resting potential Correct. A cell at rest is in a state called the resting potential.
D) action potential TOPIC: Neurons and Nerves: Building the Network

Question 55

Which of the following is TRUE about myelin?

A) It's made of a fatty substance. Correct. Myelin is made up of a fatty type of tissue called glial cells.
B) It is covered by axons. Incorrect. Myelin covers axons. It is not covered by axons.
C) It inhibits neural communication.
D) It slows down neuronal operations. TOPIC: Neurons and Nerves: Building the Network

Question 56

The term neurotransmitter refers to ________.

A) a chemical found in the synaptic vesicles that is released into the synapse Correct. Neurotransmitters are chemicals.
B) any one of a number of chemical compounds that increase the activity of the endocrine system
C) the chemical substance found in the cell membrane Incorrect. The neurotransmitter is found in the synaptic vesicle.
D) the DNA contained in the nucleus of every neuron TOPIC: Neurons and Nerves: Building the Network

Question 57

A group of axons bundled together coated in myelin that travels together through the body is called a ________.

A) synaptic vesicle
B) nerve Correct. Bundles of myelin-coated axons travel together in cables called nerves.
C) neurilemma Incorrect. Neurilemma enable damaged neurons to repair themselves.
D) myelinated pathway TOPIC: Neurons and Nerves: Building the Network

Question 58

One purpose of the ________ is to speed up the neural message traveling down the axon.

A) receptor site
B) axon terminal Incorrect. The axon terminal does not speed up the neural impulse.
C) myelin Correct. Myelin speeds up the neural impulse.
D) synaptic vesicle TOPIC: Neurons and Nerves: Building the Network

Question 59

A ________.

A) glial cell
B) neurotransmitter Correct. Neurotransmitters are stored in the synaptic vesicles.
C) precursor cell
D) synapse Incorrect. The synapse is the space between the synaptic knob of one cell and the dendrites of the next cell.
TOPIC: Neurons and Nerves: Building the Network

Question 60

The state during which a neuron contains more negatively charged ions inside the cell than outside the cell and is NOT firing is referred to as the ________.

A) action potential Incorrect. Action potential is the state a neuron is in when firing.
B) quiet potential
C) synaptic potential
D) resting potential Correct. Resting potential is the state a neuron is in when a cell is not firing a neural impulse.
TOPIC: Neurons and Nerves: Building the Network

Question 61

GABA functions as ________.

A) the major neurotransmitter involved in voluntary movements
B) an inhibitory neurotransmitter in the brain Correct. GABA is an inhibitory neurotransmitter.
C) the neurotransmitter responsible for slowing intestinal activity during stress
D) the major excitatory neurotransmitter in the brain Incorrect. GABA is an inhibitory neurotransmitter.
TOPIC: Neurons and Nerves: Building the Network

Question 62

Which neurotransmitter is associated with sleep, mood, and appetite?

A) GABA Incorrect. GABA is associated with helping calm anxiety.
B) serotonin Correct. Serotonin is associated with mood, sleep, and appetite.
C) dopamine
D) acetylcholine TOPIC: Neurons and Nerves: Building the Network

Question 63

Isabella is putting mustard on her hot dog. She realizes she has put too much and sucks up some of it back into the squeeze bottle. This process is similar to:

A) the action potential.
B) receptor site bindings.
C) binding specificity. Incorrect. Binding specificity refers to the fact that receptor sites are designed to receive only one specific neurotransmitter.
D) reuptake. Correct. Recall take occurs when excess neurotransmitters are reabsorbed into the sending neuron.
TOPIC: Neurons and Nerves: Building the Network

Question 64

The effect of alcohol is to enhance the effect of ________, which causes the general inhibition of the nervous system associated with getting drunk.

A) GABA Correct. GABA is an inhibitory neurotransmitter.
B) serotonin
C) dopamine
D) acetylcholine Incorrect. Acetylcholine is not associated with the effects of alcohol.
TOPIC: Neurons and Nerves: Building the Network

Question 65

Agonist is to antagonist as:

A) neuromodulator is to neurotransmitter.
B) reuptake is to receptor.
C) mimic is to block. Correct. Agonists mimic neurotransmitters by stimulating specific receptor sites, and antagonists block receptor sites.
D) block is to mimic. Incorrect. This is the opposite of the correct answer.
TOPIC: Neurons and Nerves: Building the Network

Question 66

Endorphins are ________.

A) found where neurons meet skeletal muscles
B) less powerful than enkaphalins
C) pain-controlling chemicals Correct. Endorphins are pain-controlling chemicals.
D) radically different in function from neurotransmitters Incorrect. Endorphins are neurotransmitters.
TOPIC: Neurons and Nerves: Building the Network

Question 67

Andy has decided to seek medical help for mood disturbances and appetite problems. Which neurotransmitter is most likely involved in the problems Andy is experiencing?

A) GABA Incorrect. GABA is involved in sleep and inhibits movement but is not associated with mood or appetite.
B) dopamine
C) serotonin Correct. Serotonin is associated with mood and appetite.
D) acetylcholine TOPIC: Neurons and Nerves: Building the Network

Question 68

Which structure is like a locked door that only certain neurotransmitter keys can unlock?

A) synapses Incorrect. Synapses are microscopic fluid-filled spaces between neurons.
B) receptor sites Correct. Only certain neurotransmitters can fit into receptor sites.
C) neural chiasms
D) response terminals TOPIC: Neurons and Nerves: Building the Network

Question 69

________ are three-dimensional proteins on the surface of the dendrites or certain cells of the muscles and glands that are shaped to fit only certain neurotransmitters.

A) Neurotransmitters
B) Axons
C) Synaptic vesicles Incorrect. Neurotransmitters are stored in the synaptic vesicle.
D) Receptor sites Correct. Molecules that float across the synapse fit themselves into receptor sites like keys fitting into a lock, thus activating the next cell.
TOPIC: Neurons and Nerves: Building the Network

Question 70

________ plays a critical role as a neurotransmitter that stimulates skeletal muscles to contract.

A) Acetylcholine Correct. Acetylcholine is an excitatory neurotransmitter that stimulates muscles to contract.
B) GABA Incorrect. GABA is an inhibitory neurotransmitter.
C) Dopamine
D) Endorphin TOPIC: Neurons and Nerves: Building the Network

Question 71

Curare, a poison, works by ________.

A) blocking receptor sites and acting as an antagonist for acetylcholine Correct. This drug acts as an antagonist for acetylcholine.
B) stimulating the release of excessive amounts of acetylcholine Incorrect. This drug inhibits the release of acetylcholine.
C) stimulating the release of neurotransmitters
D) inhibiting the production of inhibitory neurotransmitters TOPIC: Neurons and Nerves: Building the Network

Question 72

Sara has been experiencing a serious memory problem. An interdisciplinary team has ruled out a range of causes and believes that a neurotransmitter is involved. Which neurotransmitter is most likely involved in this problem?

A) GABA Incorrect. GABA has a tranquilizing effect.
B) dopamine
C) serotonin
D) acetylcholine Correct. Acetylcholine is found in a part of the brain responsible for forming new memories.
TOPIC: Neurons and Nerves: Building the Network

Question 73

The two main divisions of the nervous system are the ________ and ________.

A) brain; spinal cord
B) autonomic; somatic nervous systems Incorrect. The autonomic and somatic nervous systems are divisions of the peripheral nervous system.
C) peripheral nervous system; central nervous system Correct. These are the two main divisions of the nervous system.
D) glands; muscles TOPIC: An Overview of the Nervous System

Question 74

Enzymatic degradation is the process by which an excess of a neurotransmitter called ________ is removed from synapses .Other neurotransmitters can be removed via the process of reuptake.

A) dopamine
B) GABA
C) norepinephrine Incorrect. NE can be removed via either process.
D) acetylcholine Correct. ACh cannot be removed via reuptake, and so it requires enzymatic degradation.
TOPIC: Neurons and Nerves: Building the Network

Question 75

Pain-controlling chemicals in the body are called ________.

A) neural regulators Incorrect. Not all neural regulators are endorphins.
B) histamines
C) androgens
D) endorphins Correct. Endorphins are pain-controlling chemicals.
TOPIC: Neurons and Nerves: Building the Network

Question 76

How is acetylcholine removed from the synapse?

A) It is broken down by an enzyme. Correct. It is broken down by an enzyme.
B) It is taken back up in the synapse. Incorrect. It is broken down by an enzyme.
C) It dissipates in the surrounding body fluids.
D) Acetylcholine is one of the few neurotransmitters that is continually present in the synapse. TOPIC: Neurons and Nerves: Building the Network

Question 77

After being bitten by a black widow spider, Jean starts to convulse. This is a result of ________.

A) a lack of GABA being released into her bloodstream Incorrect. The correct answer is
B) a resurgence of neurotransmitters overstimulating her brain stem
C) a surge of chemicals blocking the transmission of fluids to the spinal cord
D) a flood of acetylcholine releasing into the body's muscle system Correct. This is the result of the bite. The result can also include death.
TOPIC: Neurons and Nerves: Building the Network
D)

Question 78

Reuptake is ________.

A) a chemical that is released into the synaptic gap Incorrect. Reuptake is a process.
B) a protein molecule on the dendrite or cell body of a neuron that will interact only with specific neurotransmitters
C) a process by which neurotransmitters are taken back into the synaptic vesicles Correct. This is the definition of reuptake.
D) a chemical that plays a role in learning and attention TOPIC: Neurons and Nerves: Building the Network

Question 79

________ synapses make it more likely that a neuron will send its message to other neurons, whereas ________ synapses make it less likely that a neuron will send its message.

A) Excitatory; inhibitory Correct. Excitatory synapses turn cells on and inhibitory ones turn cells off.
B) Inhibitory; excitatory Incorrect. Inhibitory synapses turn cells off and excitatory ones turn cells on.
C) Augmentation; depletion
D) Depletion; augmentation TOPIC: Neurons and Nerves: Building the Network

Question 80

Because they have similar chemical structures, morphine and heroin are able to lock into receptor sites for ________.

A) GABA Incorrect. Opiates are not able to lock into GABA receptor sites.
B) serotonin
C) dopamine
D) endorphins Correct. Endorphins are a natural substance that has the same effect as opiates.
TOPIC: Neurons and Nerves: Building the Network