CITY UNIVERSITY OF NEW YORY 8. Which BEST describes the latent period that prece
ID: 3519319 • Letter: C
Question
CITY UNIVERSITY OF NEW YORY 8. Which BEST describes the latent period that precedes a muscle contraction? It is the time for the action potential to arrive from the nerve to the muscle. B. It is the time for myosin to form cross bridges with actin. C. It is the time for calcium to be released. D. It is the time for all the motor units to be activated. A E. None of the above, 9- Which is CORRECT about the acetylcholine receptor? A It binds ATP. B. It binds calcium. C. It is found on the synaptic terminal. D. It operates by primary active transport E. It is a cation channel. 10. Which is the function of extracellular calcium entering the synaptic terminals? A. It binds troponin C. D. It activates acetylcholinesterase. B. It binds actin. E. It stimulates exocytosis. C. It binds myosin. 11. Which is cORRECT about the skeletal muscle action potential? A. Depolarization is due to opening of voltage gated sodium channels. B. It requires depolarization to threshold by the acetylcholine receptor C. Repolarization is due to opening of voltage gated potassium channels D. It is all or none. E. All of the above, 12. Which is FALSE about skeletal muscle? A. Binding of ATP releases the myosin heads from actin. B. The terminal cistemae contain proteins that release calcium. C. The thin filaments move past the stationary thick filaments. D. Large motor units have a finer degree of control than small motor units. E. None of the above. 13. Which is the function of myoglobin? C. It binds actin. A. It binds calcium. D. It binds myosin. B. It binds oxygen. E. None of the above. 14. Which is the correct order of recruitment? 1. Slow oxidative fibers. 2. Fast oxidative fibers. 3. Fast glycolytic fibers B. 3,2,1 A. 1, 2, 3Explanation / Answer
8. c) it is the time for calcium to be released
The latent period preceding muscle contaction is characterised by release of calcium from sarcoplasmic reticulum.