How long does a single action potential in a skeletal muscle fiber last?
a. 1 to 2 seconds
b. 0.5 seconds
c. 5 milliseconds
d. 1 to 2 milliseconds
e. 0.5 milliseconds
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Question 2) Which is not a function of the basal nuclei?
a. inhibition of muscle tone
b. coordination of impulses related to posture
c. suppression of unnecessary motor activity
d. autonomic control
e. None of the above are functions of the basal nuclei.
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Question 3) Which molecule binds ATP in order for muscle contraction to occur?
a. sarcolemma
b. actin
c. myosin
d. calcium
e. phosphate
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Question 4) The neurotransmitter required for long-term potentiation is
a. epinephrine
b. acetylcholine
c. glycine
d. glutamate
e. norepinephrine
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Question 5) What are the two membranous structures within the muscle fiber that play important roles in linking excitation to contraction?
a. horizontal tubules and sarcoplasmic reticulum
b. transverse tubules and sarcoplasmic reticulum
c. transverse tubules and endoplasmic reticulum
d. horizontal tubules and endoplasmic reticulum
e. sarcolemma and plasma end plates
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Question 6) What part of the brain plays a vital role in short-term memory involving the integration of various related stimuli and is also crucial for consolidation into long-term memory?
a. hippocampus
b. basal nuclei
c. cerebellum
d. cerebral cortex
e. hypothalamus
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Question 7) How many thin filaments are on each end of a sarcomere?
a. 6
b. 5
c. 4
d. 3
e. 2
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Question 8) ____ memories are memories of facts that often result after only one experience, whereas ____ memories involve motor skills gained via repetitive training.
a. Declarative; procedural
b. Procedural; declarative
c. Short-term; long-term
d. Long-term; short-term
e. None of the above
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Question 9) How many heads does each myosin molecule have?
a. 5
b. 4
c. 3
d. 2
e. 1
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Question 10) Short-term memory
a. has a larger storage capacity than long-term memory
b. takes longer to retrieve than long-term memory
c. involves transient modifications in preexisting synapses
d. involves relatively permanent structural changes between existing neurons
e. is characterized by two of the above
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