Select all options which are part of the latent period for skeletal, cardiac, or smooth muscle. Question 2 options: P leaves the head, causing the power stroke Action potential travels through t-tubules Troponin binds to Ca2+ Ca2+-induced Ca2+ release MLCP is activated Ca2+-ATPase pumps remove Ca2+ from the cytosol.
Added by Brenda D.
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Step 1: Troponin binds to Ca2+ - This is part of the latent period for skeletal, cardiac, or smooth muscle as it is the initial step in the process of muscle contraction. Show more…
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Which is NOT true about the latent period concerning skeletal muscle physiology? ADP bound to myosin heads is replaced by ATP. Myosin heads spontaneously bind to expose active sites forming "cross-bridges." The latent period lasts several milliseconds between action potential initiation at the neuromuscular junction and the beginning of the contraction at the sarcomere. Calcium is released from the sarcoplasmic reticulum and diffuses through the sarcoplasm. The action potential is transmitted along the T-tubules.
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Select whether each of the following events occur during the latent, contraction, or relaxation phase within a skeletal muscle cell. Select "never" if the event never occurs. Tropomyosin moves to uncover myosin-binding sites Actin slides towards the M-line of the sarcomere The RyR channel opens on the sarcoplasmic reticulum (SR) membrane The muscle cell's membrane repolarizes Ca2+ concentration starts to increase in the sarcoplasm Calcium (Ca2+) moves using secondary active transport 1. latent phase 2. contraction phase 3. relaxation phase 4. never
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Which one does NOT happen during the latent period of muscle contraction? A. Depolarization of the muscle B. Release of calcium ions from the sarcoplasmic reticulum C. Attachment of calcium ions to troponin D. Release of acetylcholine in the neuromuscular junction
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