Answer:
Red blood cell morphology
Explanation:
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The correct answer is: Release of neurotrasmitters from the synaptic vesicles
Action potential travels through the membrane of the presynaptic cell causing the 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.
They Have Different Temperatures during the seasons because of the earths tilt on the axis towards the sun. When The Northern Hemisphere of the earth Is tilted towards the sun, it warms it up, but if its tilted back it will be cold, same for the south!