In vertebrates, motor neurons release acetylcholine (ACh), a small molecule neurotransmitter, which diffuses across the synaptic cleft and binds to nicotinic acetylcholine receptors (nAChRs) on the cell membrane of the muscle fiber, also known as the sarcolemma.
Answer:The placement of fossils throughout the sruface layers of earth
Explanation:
Answer:
D
Explanation: the bones can becomew brittle from not haveing calcium
At this point the enzyme is denatured.