Answer:
neurotransmitter is released
Explanation:
A neuromuscular junction is defined as the chemical synapse between a muscle fiber and the motor neuron. When the neuromuscular junction are put into a sequence, the third event is released of the transmitter. The action potential depolarizes the terminal membrane 
rushes in releasing the neurotransmitter.
Answer: A contractile vacuole (CV) is an organelle, or sub-cellular structure, that is involved in osmoregulation and waste removal. ... In freshwater environments, the concentration of solutes inside the cell is higher than outside the cell. Under these conditions, water flows from the environment into the cell by osmosis. The contractile vacuole (CV) complex is an osmoregulatory organelle of free-living amoebae and protozoa, which controls the intracellular water balance by accumulating and expelling excess water out of the cell, allowing cells to survive under hypotonic stress as in pond water.
Explanation:
