I think it is the nervous system
Fixed layouts can involve a tremendous amount of horizontal scrolling and need much zooming on small viewports. Fixed layouts do not alter in width based on the size of the viewport. Fixed layouts use fix dimension unit such as pixel to define the width of the extents of the wireframe that fix the width of the content irrespective of the size of the viewport.
Answer:
Explanation:
Cholinergic neurons release acetylcholine as a neurotransmitter. The cell bodies of preganglionic neurons of sympathetic division are present in the lateral horns of 12 thoracic and first two lumbar segments of the spinal cord. These are the cholinergic neurons and their axons release the acetylcholine as neurotransmitter into the synaptic cleft. The acetylcholine released by preganglionic sympathetic neurons binds to the cholinergic receptors present in the membranes of postganglionic neurons of the sympathetic division.