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In what way are the somatic motor pathway and the parasympathetic autonomic motor pathway similar?


A) Both innervate glands and organs.
B) Both innervate the skeletal muscles.
C) Both utilize two neurons per message.
D) Both use acetylcholine as a neurotransmitter.
E) Both are voluntary.

F) C) and D)
G) B) and C)

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Which conducts an action potential faster and why?


A) myelinated fibers; the action potential moves through the myelin which allows it to travel faster
B) myelinated fibers; the action potential jumps from one node of Ranvier to another
C) unmyelinated fibers; the absence of myelin allows the action potential to travel faster
D) unmyelinated fibers; the action potential jumps from one node of Ranvier to another
E) unmyelinated fibers; the ions can move in and out of the cell faster without the myelin coating

F) A) and B)
G) B) and D)

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Which of the following types of nerves is not covered by a protective myelin sheath?


A) long axons
B) gray matter of the CNS
C) white matter of the CNS
D) nerve fibers within the PNS
E) axons of the CNS

F) None of the above
G) B) and E)

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The white matter of the spinal cord surrounds the gray matter.

A) True
B) False

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Wernicke's area is associated with


A) reflex centers for controlling heartbeat.
B) sexual arousal.
C) the ability to ride a bike.
D) the sense of smell.
E) the ability to speak.

F) A) and C)
G) A) and E)

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Which of the following statements is not true concerning acetylcholine's function?


A) Acetylcholine has an excitatory effect on smooth muscle and glands.
B) Acetylcholine is active in both the CNS and PNS.
C) In the PNS, acetylcholine excites skeletal muscle.
D) In the PNS, acetylcholine inhibits cardiac muscle.
E) The enzyme acetylcholinesterase removes acetylcholine from the receiving cell's membrane.

F) C) and D)
G) A) and B)

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Which of the following is not a part of the brain?


A) corpus callosum
B) central canal
C) cerebrum
D) cerebellum
E) pons

F) C) and E)
G) A) and D)

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Depolarization of the neuron occurs when


A) the potassium gates open and potassium moves outside the cell.
B) the sodium-potassium pump moves sodium inside the cell.
C) sodium gates open and sodium moves inside the cell.
D) the sodium-potassium pump moves potassium inside the cell.
E) water moves to the outside of the cell and chloride ions follow.

F) B) and E)
G) B) and D)

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What ensures the one-way direction of an action potential?


A) As soon as the action potential has passed by, that portion of the axon undergoes a short refractory period.
B) Action potentials are self-propagating.
C) Conduction of an action potential is an all-or-none event.
D) An action potential at one node causes an action potential at the next node.
E) An axon can conduct a volley of action potentials very quickly.

F) C) and D)
G) D) and E)

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Which of the following statements is not true concerning spinal nerves?


A) The ventral root contains motor fibers exiting the gray matter.
B) The dorsal root contains sensory fibers entering the gray matter.
C) Spinal nerves are considered part of the CNS.
D) The dorsal and ventral roots join before the spinal nerve leaves the vertebral canal.
E) The spinal nerves project from the cord through intervertebral foramina.

F) C) and D)
G) D) and E)

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Place the following steps in the correct order for a reflex arc: 1) Sensory neurons pass signals to interneurons. 2) Nerve signals travel along motor fibers to an effector. 3) Sensory receptors generate nerve signals. 4) Interneurons synapse with motor neurons. 5) There is a response to the stimulus.


A) 3,4,1,2,5
B) 2,1,3,4,5
C) 1,2,3,4,5
D) 3,1,4,2,5
E) 2,4,1,3,5

F) A) and D)
G) B) and D)

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Which of the following statements is not true concerning the central nervous system?


A) The central nervous system is made up of the spinal cord and the brain.
B) The brain and spinal cord contain only white matter: myelinated axons that run together in bundles.
C) Both the brain and spinal cord are protected by bone.
D) Both the brain and spinal cord are protected by meninges.
E) The spaces around the brain and spinal cord are filled with fluid.

F) A) and C)
G) A) and E)

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How is alcohol classified?


A) stimulant
B) depressant
C) psychoactive
D) inhibitor
E) none of these

F) A) and C)
G) A) and E)

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Which brain structure is associated with the limbic system?


A) hippocampus
B) frontal lobes
C) medulla oblongata
D) pons
E) brain stem

F) A) and D)
G) A) and C)

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The intensity of a message is determined by how many action potentials are generated within a given time.

A) True
B) False

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Which of the following is associated with the PNS but not the CNS?


A) Schwann cells
B) myelin sheath
C) axon
D) dendrite
E) node of Ranvier

F) A) and B)
G) C) and D)

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When a student pulls an all-nighter to cram for a test the next day,the information usually goes into


A) skill memory.
B) episodic memory.
C) semantic memory.
D) long-term memory.
E) short-term memory.

F) A) and B)
G) B) and C)

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Which brain system receives sensory information from the skin,skeletal muscles,and tendons?


A) somatic system of the PNS
B) somatic system of the CNS
C) autonomic system of the PNS
D) autonomic system of the CNS
E) all of these

F) All of the above
G) A) and D)

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Which of the following could happen to the neurotransmitter once it binds to the receiving membrane receptors?


A) reabsorbed by the sending membrane
B) absorbed by the receiving membrane in order to start the action potential
C) stays bound to the receiving membrane
D) released back into the synaptic cleft where it builds up
E) degrades due to lack of Ca+

F) C) and D)
G) D) and E)

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What type of memory does language depend upon?


A) short-term
B) semantic
C) episodic
D) skill
E) long term

F) None of the above
G) B) and C)

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