Ca2+ binding to tropomyosin causes myosin to change shape, physically moving it away from its blocking position.
a. True
b. False
Indicate whether the statement is true or false
(
Question 2) Efferent neurons are motor neurons.
Indicate whether the statement is true or false
(
Question 3) On binding to actin, the myosin head tilts 45 degrees inward.
a. True
b. False
Indicate whether the statement is true or false
(
Question 4) Nerves of the autonomic nervous system control skeletal muscle responses.
Indicate whether the statement is true or false
(
Question 5) Both the thin and thick filaments change length during muscle fiber shortening.
a. True
b. False
Indicate whether the statement is true or false
(
Question 6) Narcolepsy is linked to a deficiency of
a. glutamate
b. neuregulin
c. dopamine
d. adenosine
e. hypocretin
(
Question 7) Tropomyosin and troponin are often called stimulation proteins because of their role in covering or exposing the binding sites for cross-bridge interaction between actin and myosin.
a. True
b. False
Indicate whether the statement is true or false
(
Question 8) Paradoxical sleep exhibits all of the following except
a. brain waves similar to an awake person
b. frequent shifting of the body
c. dreaming
d. irregular heart rate
e. rapid eye movements
(
Question 9) Tropomyosin molecules are threadlike proteins that lie end to end alongside the groove of the actin spiral.
a. True
b. False
Indicate whether the statement is true or false
(
Question 10) The region of the brain responsible for regulating muscle tone and coordinating skilled voluntary movement is the
a. vestibulocerebellum
b. spinocerebellum
c. brain stem
d. cerebrocerebellum
e. prefrontal area
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