If all of the calcium within a muscle fiber was removed, which of the following could still occur?
The heads of the myosin myofilaments bind to G-actin to form cross-bridges.
An action potential that was produced at the neuromuscular junction is propagated along the sarcolemma.
The troponin molecules bound to G actin molecules are released, causing tropomyosin to move.
The heads of the myosin molecules return to their resting position and the recovery stroke occurs.
_____
The heads of the myosin myofilaments bind to G-actin to form cross-bridges.
_____
An action potential that was produced at the neuromuscular junction is propagated along the sarcolemma.
_____
The troponin molecules bound to G actin molecules are released, causing tropomyosin to move.
__X__
The heads of the myosin molecules return to their resting position and the recovery stroke occurs.
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a) Progesterone b) Estrogen c) Testosterone d) Aldosterone e) Relaxin
A person working in the hot sun loses the greatest amount of water from the ________.
A. GI tract B. skin C. lungs D. urine E. mouth
Which of these is a first-class lever?
A. The humeroulnar joint B. The knee joint C. The talocrural joint D. Any metacarpophalangeal joint E. The atlanto-occipital joint
The prime extensor of the elbow joint is the
A. brachioradialis. B. deltoid muscle. C. biceps brachii. D. brachialis. E. triceps brachii.