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in the image to the left identify an example of the following: Exocytosis Protei

ID: 167021 • Letter: I

Question

in the image to the left identify an example of the following: Exocytosis Proteins facilitating exocytosis Ligand Ligand-gated receptor Enzyme Phospholipid bilayer Channel protein Facilitated diffusion Vesicle The cartoon below is depiction of a neuron communicating with a muscle. To do this, the neuron releases acetylcholine via exocytosis. osis is facilitated by a complex of proteins (that you don't need to name right now). When acetylcholine is released into the extracellular fluid, it diffuses. If it contacts the binding site on the acetylcholine receptor proteins (a ligand gated ion channel, the receptors change shape. This opens a pore for sodium ions to enter the muscle cell, which causes it to activate and contract. In the image to the left, identify an example of the following: Exocytosis Extracellular Fluid Neuron Proteins facilitating exocytosis Ligand Ligand-gated receptor Enzyme Phospholipid bilayer Channel protein Muscle Cell Facilitated diffusion Vesicle

Explanation / Answer

exocytosis- acetylcholine

proteins facilitating exocytosis- SNARE proteins (V-snare and t-snare)

ligand- acetylcholine

ligand gated receptor- nicotinic acetylcholine receptor

enzyme- acetylcholinesterase

phospholipid bilayer- muscle membrane

channel protein- voltage gated gated Na+ channels

facilitated diffusion- Na+

vesicle- acetylcholine containing vesicles.