Question 7 10 Points A new experimental drug is shown to be useful as a muscle relaxant during surgery. Which of the following could be its possible mechanism of action? (There are more than one correct responses) A) Block Sodium-Calcium exchanger at sarcoplasmic membrane B) Block nicotinic acetylcholine gated sodium channels C) Activate DHPR receptors D) Block Ryanodine receptors Question 8 10 Points The nervous control of movements uses which of the following techniques to control the force of contraction of a muscle when lifting a heavier object versus a lighter object? (There are more than one correct responses) A) Change in frequency of nerve impulses to the muscle B) Change delivery of oxygen to the muscle C) Convert SO fibers to FOG fibers D) Change contractile response of the series elastic component E) Change number of motor units activated
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- Block nicotinic acetylcholine gated sodium channels: This could also be a possible mechanism as blocking these channels would prevent the depolarization of the muscle cells, leading to muscle relaxation. - Activate DHPR receptors: This is not a possible Show more…
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