Nbme 15
During an experiment of muscle contraction, intracellular Ca is decreased after a substance is administered to a muscle preparation obtained from experimental animal. which of the following best explains why contraction is inhibited in this case?
A- Ach release increase
B- Depolarization a long T-tubules is enhanced
C- Myosin binding sites on actin remain covered with TROPONIN C !!
D- Na influx is increased
E- Tropomyosin is dettached from actin
Answer keys say C which doesn't make sense...
NBME 15
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Bahz Beh Source Type: forums
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