2.Put these events in the correct
chronological sequence:
1. Upper motor neuron fires an action
potential
2. T-tubules convey action potentials
into the interior of the cell.
3. Acetylcholine is released from the
lower motor neuron.
4. Ca2+ is released from the
sarcoplasmic reticulum.
A) 1, 2, 3, 4
B) 3, 1, 2, 4
C) 2, 1, 4, 3
D) 1, 3, 2, 4
E) 4, 3, 2, 1
4.Which of the following sequences
represent muscle contraction?
A)Action Potential leads...