Answer:
a. Release of acetylcholine from the synaptic vesicles
Explanation:
The events on neuromuscular junction:
Action potential travels through the membrane of the presynaptic cell causing the voltage-gated channels permeable to calcium ions to open. Ca2+ flow through the presynaptic membrane and increase the Ca concentration in the cell which will activate proteins attached to vesicles that contain a neurotransmitter (e.g. acetylcholine). Vesicles fuse with the membrane of the presynaptic cell, thereby release their contents into the synaptic cleft-space between the membranes of the pre- and postsynaptic cells. Neurotransmitter ACh binds to its receptors on the postsynaptic membrane and its binding causes depolarization of the target cell (muscle cell). Depolarization occurs because sodium enters the cell as a result of neurotransmitter receptor binding.
G0 phase cells
The mitotic cycle of somatic, or body, cells is responsible for the production of copies of those cells. The mitotic cycle has different phases, each of which involves a different set of physiological changes to the cell. The G0 phase is described as the resting phase of a cell, where no activities relating to cell division are taking place. G0 phase cells remain in this phase their entire lives, so they do not divide. Another example of such a cell is found in red blood cells.
For 2,000 mice living in a field, the per capita growth rate is mathematically given as
NT=0.4
<h3>What is the per capita growth rate (rmax) of mice over a month?</h3>
Generally, the birth and death rate is mathematically given as
BT=1000/2000
BT=0.5
Where
DT=200/2000
DT=0.1
In conclusion, per capita growth rate
NT=0.5-0.1
NT=0.4
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