Question 1

List in order the steps associated with a reflex arc of the PNS.

Accepted Answer

1.The sensory receptor will detect the s

Question 2

When the dorsal root of a spinal nerve is cut

Accepted Answer

A) death immediately occurs. 
B) incoming sensory nerve impulses are lost. 
C) outgoing motor nerve impulses are lost. 
D) impulses do not cross over to the other side of the body. 
A) death immediately occurs. 
B) incoming sensory nerve impulses are lost. 
C) outgoing motor nerve impulses are lost. 
D) impulses do not cross over to the other side of the body.

Question 3

There are two major groups of nervous system drugs.Drugs in one group retard heartbeat,promote digestion,contract the eye pupil,etc.The other drugs have the opposite effect.These drugs are affecting the

Accepted Answer

A) motor and sensory nerves. 
B) sympathetic and parasympathetic nervous systems. 
C) central and peripheral nervous systems. 
D) neurostimulatory and neuroinhibitory synapses. 
E) cerebrum and cerebellum,respectively. 
A) motor and sensory nerves. 
B) sympathetic and parasympathetic nervous systems. 
C) central and peripheral nervous systems. 
D) neurostimulatory and neuroinhibitory synapses. 
E) cerebrum and cerebellum,respectively.

Question 4

The part of the brain that integrates sensory input from the eyes,ears,muscles,and joins with motor information from the cerebral cortex is the

Accepted Answer

A) cerebrum. 
B) cerebellum. 
C) brain stem. 
D) diencephalon. 
A) cerebrum. 
B) cerebellum. 
C) brain stem. 
D) diencephalon.

Question 5

What symptoms could result from a stroke to the right side of the frontal lobe?

Accepted Answer

A) The person could suffer the loss of motor control of the left side of their body,loss of memory,reasoning and judgment. 
B) The person could suffer the loss of motor control of the right side of their body,loss of memory,reasoning and judgment. 
C) The person could suffer the loss of motor control of the left side of their body,loss of memory,and speech. 
D) The person could suffer the loss of motor control of the right side of their body,loss of memory,reasoning and speech. 
A) The person could suffer the loss of motor control of the left side of their body,loss of memory,reasoning and judgment. 
B) The person could suffer the loss of motor control of the right side of their body,loss of memory,reasoning and judgment. 
C) The person could suffer the loss of motor control of the left side of their body,loss of memory,and speech. 
D) The person could suffer the loss of motor control of the right side of their body,loss of memory,reasoning and speech.

Question 6

Which of the following associations between structure and function is NOT correct?

Accepted Answer

A) axons - conduct signals away from the cell body 
B) sensory neuron - take nerve impulses from the CNS to muscles or glands 
C) cell body - contains nucleus and organelles 
D) dendrites - receive signals and transmit them to the cell body 
E) interneuron - convey nerve impulses between various parts of the CNS 
A) axons - conduct signals away from the cell body 
B) sensory neuron - take nerve impulses from the CNS to muscles or glands 
C) cell body - contains nucleus and organelles 
D) dendrites - receive signals and transmit them to the cell body 
E) interneuron - convey nerve impulses between various parts of the CNS

Question 7

The absence of this neurotransmitter would lead to a person having problems regulating body temperature and controlling their emotions.

Accepted Answer

A) serotonin 
B) endorphins 
C) acetylcholinesterase 
D) dopamine 
A) serotonin 
B) endorphins 
C) acetylcholinesterase 
D) dopamine

Question 8

Which of the following statements about axonal membranes is NOT true?

Accepted Answer

A) The resting potential of a typical neuron is -70 mV. 
B) There is an electrical potential difference across a neuron's membrane. 
C) The polarity correlates with a difference in ion distribution across the membrane. 
D) At rest,there is a higher concentration of sodium ions inside the axon. 
E) The sodium-potassium pump establishes a concentration gradient across the membrane. 
A) The resting potential of a typical neuron is -70 mV. 
B) There is an electrical potential difference across a neuron's membrane. 
C) The polarity correlates with a difference in ion distribution across the membrane. 
D) At rest,there is a higher concentration of sodium ions inside the axon. 
E) The sodium-potassium pump establishes a concentration gradient across the membrane.

Question 9

What statement is NOT true about the human nervous system?

Accepted Answer

A) The somatic nervous system controls skeletal muscles. 
B) The somatic nervous system is further divided into the sympathetic and parasympathetic divisions. 
C) The central nervous system consists of the brain and spinal cord. 
D) The somatic nervous system is part of the peripheral nervous system. 
E) The autonomic nervous system controls glands and smooth muscles of the viscera. 
A) The somatic nervous system controls skeletal muscles. 
B) The somatic nervous system is further divided into the sympathetic and parasympathetic divisions. 
C) The central nervous system consists of the brain and spinal cord. 
D) The somatic nervous system is part of the peripheral nervous system. 
E) The autonomic nervous system controls glands and smooth muscles of the viscera.

Question 10

Neurotransmitters are molecules that cross the synaptic cleft and

Accepted Answer

A) always inhibit the postsynaptic neuron. 
B) always excite the postsynaptic neuron. 
C) either excite or inhibit the postsynaptic neuron. 
D) integrate the pre-synaptic action potential. 
E) None of these. 
A) always inhibit the postsynaptic neuron. 
B) always excite the postsynaptic neuron. 
C) either excite or inhibit the postsynaptic neuron. 
D) integrate the pre-synaptic action potential. 
E) None of these.

Question 11

Which of the following statements about the peripheral nervous system is NOT correct?

Accepted Answer

A) The nerves contain the cell bodies of the neurons. 
B) The nerves contain nerve fibers which are bundles of axons. 
C) The somatic nervous system sends motor impulses to the skeletal muscles. 
D) Effectors include the muscles that carry out the instructions sent from the central nervous system. 
E) Cranial and spinal nerves are part of the peripheral nervous system. 
A) The nerves contain the cell bodies of the neurons. 
B) The nerves contain nerve fibers which are bundles of axons. 
C) The somatic nervous system sends motor impulses to the skeletal muscles. 
D) Effectors include the muscles that carry out the instructions sent from the central nervous system. 
E) Cranial and spinal nerves are part of the peripheral nervous system.

Question 12

What unique structural adaptations are found in the mammalian brain that allowed mammals to become adept at higher mental activities?

Accepted Answer

A) A higher degree of crevasses and folds in the neocortex that increases the surface area of the brain. 
B) An increased number of blood vessels that increases the vascularization of the brain. 
C) An enlarged pons. 
D) A cranium that will protect the brain from damage. 
E) A more direct connection to the spinal cord for faster conduction of neural impulses. 
A) A higher degree of crevasses and folds in the neocortex that increases the surface area of the brain. 
B) An increased number of blood vessels that increases the vascularization of the brain. 
C) An enlarged pons. 
D) A cranium that will protect the brain from damage. 
E) A more direct connection to the spinal cord for faster conduction of neural impulses.

Question 13

The ascending tracts of the spinal cord are responsible sensory and motor functions of the peripheral nervous system that control the skeletal muscles.

Accepted Answer

A) True 
 B)False

Question 14

Draw a graph of an action potential that illustrates voltage changes over time.Define and indicate where depolarization and repolarization occurs.Include and label the region of resting potential,action potential and the threshold.Also describe what occurs in terms of ion movement across the membrane to initiate an action potential and during the action potential.

Accepted Answer

A sample graph of an action potential is

Question 15

In dissection,most nerve fibers appear gray to white because

Accepted Answer

A) the neuron is gray to white colored. 
B) sodium ions are part of the salt compound and they flow along the surface. 
C) nerve fibers rapidly die and dead tissues soon become gray or white. 
D) nerve fibers are covered in a myelin sheath made of lipid or fat molecules. 
E) nerve fibers consume large amounts of energy in the form of sugar. 
A) the neuron is gray to white colored. 
B) sodium ions are part of the salt compound and they flow along the surface. 
C) nerve fibers rapidly die and dead tissues soon become gray or white. 
D) nerve fibers are covered in a myelin sheath made of lipid or fat molecules. 
E) nerve fibers consume large amounts of energy in the form of sugar.

Question 16

An animal with a ladder-like nervous system is the

Accepted Answer

A) earthworm. 
B) cat. 
C) hydra. 
D) octopus. 
E) planarian. 
A) earthworm. 
B) cat. 
C) hydra. 
D) octopus. 
E) planarian.

Question 17

The connection space between the dendrite of one cell and the axon of another cell is called a(n)

Accepted Answer

A) synapse. 
B) neurotransmitter. 
C) axonic connection. 
D) threshold. 
A) synapse. 
B) neurotransmitter. 
C) axonic connection. 
D) threshold.

Question 18

Which of the following statements about the autonomic nervous system is NOT true?

Accepted Answer

A) The autonomic nervous system regulates the activities of cardiac and smooth muscle and glands. 
B) The sympathetic nervous system deals with "fight-or-flight" responses. 
C) The functions of the autonomic system are generally involuntary and subconscious. 
D) The parasympathetic nervous system promotes actions associated with relaxation. 
E) The neurotransmitter associated with the parasympathetic system is norepinephrine. 
A) The autonomic nervous system regulates the activities of cardiac and smooth muscle and glands. 
B) The sympathetic nervous system deals with "fight-or-flight" responses. 
C) The functions of the autonomic system are generally involuntary and subconscious. 
D) The parasympathetic nervous system promotes actions associated with relaxation. 
E) The neurotransmitter associated with the parasympathetic system is norepinephrine.

Question 19

When you are studying with the TV on,which part of the brain filters out unnecessary sensory stimuli so that you can focus on your studies?

Accepted Answer

A) hypothalamus 
B) cerebellum 
C) reticular activating system 
D) limbic system 
E) basal nuclei 
A) hypothalamus 
B) cerebellum 
C) reticular activating system 
D) limbic system 
E) basal nuclei

Question 20

The functions of the human nervous system include

Accepted Answer

A) sensory input. 
B) integration. 
C) generation of motor output. 
D) detection of stimuli. 
E) All of the choices characterize the human nervous system's functions. 
A) sensory input. 
B) integration. 
C) generation of motor output. 
D) detection of stimuli. 
E) All of the choices characterize the human nervous system's functions.

Exam 37: Neurons and Nervous Systems

List in order the steps associated with a reflex arc of the PNS.

When the dorsal root of a spinal nerve is cut

There are two major groups of nervous system drugs.Drugs in one group retard heartbeat,promote digestion,contract the eye pupil,etc.The other drugs have the opposite effect.These drugs are affecting the

The part of the brain that integrates sensory input from the eyes,ears,muscles,and joins with motor information from the cerebral cortex is the

What symptoms could result from a stroke to the right side of the frontal lobe?

Which of the following associations between structure and function is NOT correct?

The absence of this neurotransmitter would lead to a person having problems regulating body temperature and controlling their emotions.

Which of the following statements about axonal membranes is NOT true?

What statement is NOT true about the human nervous system?

Neurotransmitters are molecules that cross the synaptic cleft and

Which of the following statements about the peripheral nervous system is NOT correct?

What unique structural adaptations are found in the mammalian brain that allowed mammals to become adept at higher mental activities?

The ascending tracts of the spinal cord are responsible sensory and motor functions of the peripheral nervous system that control the skeletal muscles.

In dissection,most nerve fibers appear gray to white because

An animal with a ladder-like nervous system is the

The connection space between the dendrite of one cell and the axon of another cell is called a(n)

Which of the following statements about the autonomic nervous system is NOT true?

When you are studying with the TV on,which part of the brain filters out unnecessary sensory stimuli so that you can focus on your studies?

The functions of the human nervous system include

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