Arrange the following parts of sarcomere from periphery to center. 1. Z line 2. M line 3. A band 4. H zone
A2,3,4,1
B4,2,3,1
C3,1,4,2
D1,3,4,2
Sequence the events in neuromuscular action potential conduction: 1. Sodium channels open in the end plate 2. Calcium enters at the nerve terminal 3. Release of acetylcholine
A$1 \rightarrow 2 \rightarrow 3$
B$1 \rightarrow 3 \rightarrow 2$
C$3 \rightarrow 2 \rightarrow 1$
D$2 \rightarrow 3 \rightarrow 1$
Tetanic contraction is due to accumulation of?
ANa+
BK+
CCa<sup>2+</sup>
DCl<sup>-</sup>
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