Question 1

The effect of myelin and nodes of Ranvier is to make nerve impulses travel

Accepted Answer

A) away from as well as toward the cell body. 
B) faster. 
C) in many directions at once. 
D) laterally from axon to axon. 
E) slower. 
A) away from as well as toward the cell body. 
B) faster. 
C) in many directions at once. 
D) laterally from axon to axon. 
E) slower.

Question 2

The major subdivisions of the CNS are paired with their function.Select the mismatched pairing.

Accepted Answer

A) Medulla oblongata-sensory nuclei 
B) Pons-reticular activating system 
C) Cerebellum-relay station for ascending sensory and descending tracts 
D) Corpus callosum-connects the two brain hemispheres 
E) Hippocampus-memory 
A) Medulla oblongata-sensory nuclei 
B) Pons-reticular activating system 
C) Cerebellum-relay station for ascending sensory and descending tracts 
D) Corpus callosum-connects the two brain hemispheres 
E) Hippocampus-memory

Question 3

Which of the following drugs has been discovered to bind to acetylcholine receptors?

Accepted Answer

A) serotonin reuptake inhibitors 
B) thorazine 
C) cocaine 
D) codeine 
E) nicotine 
A) serotonin reuptake inhibitors 
B) thorazine 
C) cocaine 
D) codeine 
E) nicotine

Question 4

The main ion channel responsible for the action potential is

Accepted Answer

A) the voltage-gated sodium channel. 
B) the voltage-gated potassium channel. 
C) the ligand-gated sodium channel. 
D) the ligand-gated potassium channel. 
E) the non-gated sodium channel. 
A) the voltage-gated sodium channel. 
B) the voltage-gated potassium channel. 
C) the ligand-gated sodium channel. 
D) the ligand-gated potassium channel. 
E) the non-gated sodium channel.

Question 5

All of the following are true about the cerebral cortex except

Accepted Answer

A) it is a layer of densely packed nerve cells within the gray matter. 
B) in humans,it accounts for roughly 10% of all of brain neurons. 
C) in mammals,it is replaced by motor and sensory cortices. 
D) it contains the associative cortex. 
E) the associative cortex is the site of higher mental activities. 
A) it is a layer of densely packed nerve cells within the gray matter. 
B) in humans,it accounts for roughly 10% of all of brain neurons. 
C) in mammals,it is replaced by motor and sensory cortices. 
D) it contains the associative cortex. 
E) the associative cortex is the site of higher mental activities.

Question 6

Nerve impulses travel along the long cellular extension of the neuron called the

Accepted Answer

A) axons. 
B) cell bodies. 
C) dendrites. 
D) neurons. 
E) synapses. 
A) axons. 
B) cell bodies. 
C) dendrites. 
D) neurons. 
E) synapses.

Question 7

In vertebrates,the ______ nervous system is composed of the brain and the spinal cord.

Accepted Answer

A) peripheral 
B) central 
C) somatic 
D) autonomic 
E) sympathetic 
A) peripheral 
B) central 
C) somatic 
D) autonomic 
E) sympathetic

Question 8

The region of the brain that integrates visceral activities,body temperature,and heartbeat is the

Accepted Answer

A) medulla oblongatA. 
B) cerebrum. 
C) hypothalamus. 
D) thalamus. 
E) corpus callosum. 
A) medulla oblongatA. 
B) cerebrum. 
C) hypothalamus. 
D) thalamus. 
E) corpus callosum.

Question 9

The neurotransmitter that is released from the motor neuron,and the one that functions at the neuromuscular junction is ... ,

Accepted Answer

A) acetylcholine. 
B) GABA. 
C) ephinephrine. 
D) dopamine. 
E) serotonin. 
A) acetylcholine. 
B) GABA. 
C) ephinephrine. 
D) dopamine. 
E) serotonin.

Question 10

The cerebrum consists of all of the following hemispheres except the

Accepted Answer

A) frontal. 
B) parietal. 
C) optiC. 
D) temporal. 
E) occipital. 
A) frontal. 
B) parietal. 
C) optiC. 
D) temporal. 
E) occipital.

Question 11

All of the animal phyla listed have a network of nerve cells for gathering information from the environment except

Accepted Answer

A) sponges. 
B) cnidaria. 
C) platyhelminthes. 
D) nematoda. 
E) mollusca. 
A) sponges. 
B) cnidaria. 
C) platyhelminthes. 
D) nematoda. 
E) mollusca.

Question 12

The electrical impulse travels outward from the cell body along a(n)

Accepted Answer

A) axon. 
B) dendrite. 
C) Ranvier cell. 
D) Schwann cell. 
E) synapsE. 
A) axon. 
B) dendrite. 
C) Ranvier cell. 
D) Schwann cell. 
E) synapsE.

Question 13

Which of the figures shows the correct mechanism for the sodium-potassium pump?

Accepted Answer

A) A 
B) B 
C) C 
D) D 
A) A 
B) B 
C) C 
D) D

Question 14

The spinal cord is enclosed and protected by the vertebral column and layers of membranes called

Accepted Answer

A) neural net. 
B) white matter. 
C) dorsal root. 
D) meninges. 
E) viscera. 
A) neural net. 
B) white matter. 
C) dorsal root. 
D) meninges. 
E) viscera.

Question 15

When nerve cells are not producing electrical responses,there is still a voltage difference across their membranes,termed the

Accepted Answer

A) channelgate bias. 
B) electrolyte voltage. 
C) equilibrium potential. 
D) resting potential. 
E) ion current. 
A) channelgate bias. 
B) electrolyte voltage. 
C) equilibrium potential. 
D) resting potential. 
E) ion current.

Question 16

The hippocampus and amygdala are,together with the hypothalamus,the major components of the ______ system.

Accepted Answer

A) reticular-activating 
B) reflex 
C) parasympathetic 
D) limbic 
E) autonomic 
A) reticular-activating 
B) reflex 
C) parasympathetic 
D) limbic 
E) autonomic

Question 17

Place the following events involved in drug addiction,in sequence.
I-The synapse is less sensitive when the drug is removed,normal functioning can only ensue by continuing to take the drug.
II-CNS responds to increased firing by decreasing the number of receptors.
III-Drug molecule prevents reabsorption and causes overstimulation of post-synaptic membrane.

Accepted Answer

A) I,II,III 
B) III,II,I 
C) II,III,I 
D) III,I,II 
A) I,II,III 
B) III,II,I 
C) II,III,I 
D) III,I,II

Question 18

For each 3 Na+ ions pumped outward,the sodium-potassium pump takes in

Accepted Answer

A) 3 Cl-. 
B) 2 K+. 
C) 3 K+. 
D) 2 NaCl molecules. 
E) 3 water molecules. 
A) 3 Cl-. 
B) 2 K+. 
C) 3 K+. 
D) 2 NaCl molecules. 
E) 3 water molecules.

Question 19

The postganglionic neuron of the parasympathetic system releases which neurotransmitter?

Accepted Answer

A) acetylcholine 
B) norepinephrine 
C) glutamate 
D) GABA 
E) glycine 
A) acetylcholine 
B) norepinephrine 
C) glutamate 
D) GABA 
E) glycine

Question 20

The limbic system has all of the following features except

Accepted Answer

A) it contains hippocampus and amygdaliA. 
B) it resides deep within the cerebrum. 
C) it is responsible for emotional responses. 
D) it is believed to be important in the formation and recall of memories. 
E) it is part of the hypothalamus. 
A) it contains hippocampus and amygdaliA. 
B) it resides deep within the cerebrum. 
C) it is responsible for emotional responses. 
D) it is believed to be important in the formation and recall of memories. 
E) it is part of the hypothalamus.

Exam 44: The Nervous System

The effect of myelin and nodes of Ranvier is to make nerve impulses travel

The major subdivisions of the CNS are paired with their function.Select the mismatched pairing.

Which of the following drugs has been discovered to bind to acetylcholine receptors?

The main ion channel responsible for the action potential is

All of the following are true about the cerebral cortex except

Nerve impulses travel along the long cellular extension of the neuron called the

In vertebrates,the ______ nervous system is composed of the brain and the spinal cord.

The region of the brain that integrates visceral activities,body temperature,and heartbeat is the

The neurotransmitter that is released from the motor neuron,and the one that functions at the neuromuscular junction is ... ,

The cerebrum consists of all of the following hemispheres except the

All of the animal phyla listed have a network of nerve cells for gathering information from the environment except

The electrical impulse travels outward from the cell body along a(n)

Which of the figures shows the correct mechanism for the sodium-potassium pump?

The spinal cord is enclosed and protected by the vertebral column and layers of membranes called

When nerve cells are not producing electrical responses,there is still a voltage difference across their membranes,termed the

The hippocampus and amygdala are,together with the hypothalamus,the major components of the ______ system.

For each 3 Na+ ions pumped outward,the sodium-potassium pump takes in

The postganglionic neuron of the parasympathetic system releases which neurotransmitter?

The limbic system has all of the following features except

The Science of Biology

The Nature of Molecules

The Chemical Building Blocks of Life

Cell Structure

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Energy and Metabolism

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Cell Communication

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