Question 1

A person who has seizures might have a deficit of which of the following?

Accepted Answer

A) GABA 
B) dopamine 
C) glutamate 
D) serotonin 
E) histamine 
A) GABA 
B) dopamine 
C) glutamate 
D) serotonin 
E) histamine

Question 2

-The figure illustrates the Action Potential.What does "B" represent?

Accepted Answer

A) repolarization 
B) depolarization 
C) local potential 
D) threshold 
E) afterpotential 
A) repolarization 
B) depolarization 
C) local potential 
D) threshold 
E) afterpotential

Question 3

In some cells,an afterpotential occurs because

Accepted Answer

A) the sodium ions continue to enter the cell after depolarization is finished. 
B) there is prolonged,elevated permeability to potassium during repolarization. 
C) the sodium-potassium pump is actively exchanging ions across the membrane. 
D) the extracellular Na+ ion concentration is reduced. 
E) the permeability to sodium continues longer than necessary. 
A) the sodium ions continue to enter the cell after depolarization is finished. 
B) there is prolonged,elevated permeability to potassium during repolarization. 
C) the sodium-potassium pump is actively exchanging ions across the membrane. 
D) the extracellular Na+ ion concentration is reduced. 
E) the permeability to sodium continues longer than necessary.

Question 4

An IPSP is inhibitory because it

Accepted Answer

A) changes the threshold of the neuron. 
B) hyperpolarizes the postsynaptic membrane. 
C) prevents Ca2+ entry into the presynaptic terminal. 
D) reduces the amount of neurotransmitter released by the presynaptic terminal. 
E) depolarizes the postsynaptic membrane. 
A) changes the threshold of the neuron. 
B) hyperpolarizes the postsynaptic membrane. 
C) prevents Ca2+ entry into the presynaptic terminal. 
D) reduces the amount of neurotransmitter released by the presynaptic terminal. 
E) depolarizes the postsynaptic membrane.

Question 5

Match the following concerning concentration differences across the plasma membrane.
-higher inside cell

Accepted Answer

A) concentration of potassium 
B) concentration of sodium and chloride 
C) negatively charged proteins 
D) sodium/potassium pump 
E) plasma membrane is more permeable to this ion because of leak ion channels 
A) concentration of potassium 
B) concentration of sodium and chloride 
C) negatively charged proteins 
D) sodium/potassium pump 
E) plasma membrane is more permeable to this ion because of leak ion channels

Question 6

A neuron with several dendrites and a single axon would be called a ____________ neuron.

Accepted Answer

The answer of A neuron with several dendrites and a...

Question 7

The blood-brain barrier

Accepted Answer

A) permits passage of foreign substances from the blood to the neurons. 
B) prohibits the transport of amino acids and glucose to the neurons. 
C) prohibits the removal of waste materials from the neurons. 
D) protects neurons from toxic substances in the blood. 
E) does not prevent fluctuations in the composition of the blood from affecting the functions of the brain. 
A) permits passage of foreign substances from the blood to the neurons. 
B) prohibits the transport of amino acids and glucose to the neurons. 
C) prohibits the removal of waste materials from the neurons. 
D) protects neurons from toxic substances in the blood. 
E) does not prevent fluctuations in the composition of the blood from affecting the functions of the brain.

Question 8

Each voltage-gated Na+ ion channel has two voltage sensitive gates: an activation gate and an inactivation gate.Which of the following would occur during depolarization?

Accepted Answer

A) Activation gates are open; inactivation gates are closed. 
B) Activation gates are closed; inactivation gates are open. 
C) Both activation and inactivation gates are open. 
D) Both activation and inactivation gates are closed. 
E) None of these events occurs during depolarization. 
A) Activation gates are open; inactivation gates are closed. 
B) Activation gates are closed; inactivation gates are open. 
C) Both activation and inactivation gates are open. 
D) Both activation and inactivation gates are closed. 
E) None of these events occurs during depolarization.

Question 9

A stimulus either causes an action potential or it doesn't.This is called

Accepted Answer

A) an all-or-none response. 
B) a graded response. 
C) a latent period response. 
D) a relative refractory response. 
E) a local response. 
A) an all-or-none response. 
B) a graded response. 
C) a latent period response. 
D) a relative refractory response. 
E) a local response.

Question 10

The nervous system

Accepted Answer

A) monitors internal and external stimuli. 
B) transmits information in the form of action potentials. 
C) interprets or assesses information. 
D) maintains homeostasis. 
E) All of these choices are correct. 
A) monitors internal and external stimuli. 
B) transmits information in the form of action potentials. 
C) interprets or assesses information. 
D) maintains homeostasis. 
E) All of these choices are correct.

Question 11

Neurotransmitters are released from the

Accepted Answer

A) epineurium. 
B) synaptic cleft. 
C) presynaptic terminal. 
D) postsynaptic membrane. 
E) calcium channels. 
A) epineurium. 
B) synaptic cleft. 
C) presynaptic terminal. 
D) postsynaptic membrane. 
E) calcium channels.

Question 12

What inhibitory neurotransmitter is blocked in strychnine poisoning?

Accepted Answer

A) glycine 
B) acetylcholine 
C) glutamate 
D) adenosine 
A) glycine 
B) acetylcholine 
C) glutamate 
D) adenosine

Question 13

Which of the following events will lead to depolarization?

Accepted Answer

A) an increase in K+ ions in the extracellular fluid 
B) a decrease in K+ ions in the extracellular fluid 
C) an increase in the rate of diffusion of K+ ions from cells 
D) an increase in Na+ ions in the extracellular fluid 
E) None of these events would cause depolarization. 
A) an increase in K+ ions in the extracellular fluid 
B) a decrease in K+ ions in the extracellular fluid 
C) an increase in the rate of diffusion of K+ ions from cells 
D) an increase in Na+ ions in the extracellular fluid 
E) None of these events would cause depolarization.

Question 14

A change in resting membrane potential confined to a small area is called a(n)

Accepted Answer

A) local potential. 
B) action potential. 
C) summated potential. 
D) after potential. 
E) resting membrane potential. 
A) local potential. 
B) action potential. 
C) summated potential. 
D) after potential. 
E) resting membrane potential.

Question 15

The speed of an action potential depends upon

Accepted Answer

A) whether an axon is myelinated or not myelinated. 
B) thickness of the myelin sheath. 
C) the diameter of the axon. 
D) All of the choices are correct. 
A) whether an axon is myelinated or not myelinated. 
B) thickness of the myelin sheath. 
C) the diameter of the axon. 
D) All of the choices are correct.

Question 16

Chemical synapses are characterized by

Accepted Answer

A) the release of neurotransmitter by the presynaptic terminal. 
B) connexons that connect the pre- and postsynaptic cells. 
C) the presence of receptors for neurotransmitters on the presynaptic terminal. 
D) the absence of gap junctions. 
E) receptors located only on the presynaptic terminal. 
A) the release of neurotransmitter by the presynaptic terminal. 
B) connexons that connect the pre- and postsynaptic cells. 
C) the presence of receptors for neurotransmitters on the presynaptic terminal. 
D) the absence of gap junctions. 
E) receptors located only on the presynaptic terminal.

Question 17

The strength of a stimulus is communicated through

Accepted Answer

A) changes in the magnitude of the action potential. 
B) the frequency of the action potentials. 
C) the length of time action potentials are produced. 
D) both the frequency and the length of time action potentials are produced. 
A) changes in the magnitude of the action potential. 
B) the frequency of the action potentials. 
C) the length of time action potentials are produced. 
D) both the frequency and the length of time action potentials are produced.

Question 18

What type of neuroglial cells provide support and nutrition to sensory ganglia in the PNS?

Accepted Answer

A) Schwann cells 
B) microglia 
C) ependymal cells 
D) satellite cells 
A) Schwann cells 
B) microglia 
C) ependymal cells 
D) satellite cells

Question 19

Match the neuroglial cell with its function.
-oligodendrocyte

Accepted Answer

A) influence function of blood-brain barrier 
B) macrophages in CNS 
C) produce cerebrospinal fluid 
D) form myelin sheath around axons in CNS 
E) form myelin sheath around part of the axon in the PNS 
A) influence function of blood-brain barrier 
B) macrophages in CNS 
C) produce cerebrospinal fluid 
D) form myelin sheath around axons in CNS 
E) form myelin sheath around part of the axon in the PNS

Question 20

The junction of a neuron with another cell is a/an

Accepted Answer

A) synapse. 
B) ganglion. 
C) receptor. 
D) effector. 
A) synapse. 
B) ganglion. 
C) receptor. 
D) effector.

Exam 11: Functional Organization of Nervous Tissue

A person who has seizures might have a deficit of which of the following?

-The figure illustrates the Action Potential.What does "B" represent?

In some cells,an afterpotential occurs because

An IPSP is inhibitory because it

Match the following concerning concentration differences across the plasma membrane. -higher inside cell

A neuron with several dendrites and a single axon would be called a ____________ neuron.

The blood-brain barrier

Each voltage-gated Na+ ion channel has two voltage sensitive gates: an activation gate and an inactivation gate.Which of the following would occur during depolarization?

A stimulus either causes an action potential or it doesn't.This is called

The nervous system

Neurotransmitters are released from the

What inhibitory neurotransmitter is blocked in strychnine poisoning?

Which of the following events will lead to depolarization?

A change in resting membrane potential confined to a small area is called a(n)

The speed of an action potential depends upon

Chemical synapses are characterized by

The strength of a stimulus is communicated through

What type of neuroglial cells provide support and nutrition to sensory ganglia in the PNS?

Match the neuroglial cell with its function. -oligodendrocyte

The junction of a neuron with another cell is a/an

The Human Organism

The Chemical Basis of Life

Cell Biology

Tissues

Integumentary System

Skeletal System: Bones and Bone Tissue

Skeletal System: Gross Anatomy

Joints and Movement

Muscular System: Histology and Physiology

Muscular System: Gross Anatomy

Spinal Cord and Spinal Nerves

Brain and Cranial Nerves

Integration of Nervous System Functions

The Special Senses

Autonomic Nervous System

Functional Organization of the Endocrine System

Endocrine Glands

Cardiovascular System: Blood

Cardiovascular System: the Heart

Cardiovascular System: Blood Vessels and Circulation

Lymphatic System and Immunity

Respiratory System

Digestive System

Nutrition,metabolism,and Temperature Regulation

Urinary System

Water,electrolyte,and Acid-Based Balance

Reproductive System

Development,growth,aging,and Genetics

Filters