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.
Correct Answer
verified
Multiple Choice
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
Correct Answer
verified
Multiple Choice
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
Correct Answer
verified
True/False
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
A) corpus callosum
B) central canal
C) cerebrum
D) cerebellum
E) pons
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
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
Correct Answer
verified
Multiple Choice
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.
Correct Answer
verified
Multiple Choice
A) stimulant
B) depressant
C) psychoactive
D) inhibitor
E) none of these
Correct Answer
verified
Multiple Choice
A) hippocampus
B) frontal lobes
C) medulla oblongata
D) pons
E) brain stem
Correct Answer
verified
True/False
Correct Answer
verified
Multiple Choice
A) Schwann cells
B) myelin sheath
C) axon
D) dendrite
E) node of Ranvier
Correct Answer
verified
Multiple Choice
A) skill memory.
B) episodic memory.
C) semantic memory.
D) long-term memory.
E) short-term memory.
Correct Answer
verified
Multiple Choice
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
Correct Answer
verified
Multiple Choice
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+
Correct Answer
verified
Multiple Choice
A) short-term
B) semantic
C) episodic
D) skill
E) long term
Correct Answer
verified
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