Question

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nerve cells release neurotransmitters across gaps
and secretion of proteins and wastes
diffusion
exocytosis
facilitated diffusion
endocytosis

Explanation:

To solve this, we analyze each process:

• Diffusion: Passive movement of substances down concentration gradient, not for large molecules/neurotransmitters.
• Exocytosis: Process where cells release substances (like neurotransmitters, proteins, wastes) by fusing vesicles with the membrane. This matches the description of nerve cells releasing neurotransmitters and secretion of proteins/wastes.
• Facilitated Diffusion: Passive transport via proteins, not for secretion.
• Endocytosis: Process of taking substances into the cell, opposite of secretion.

So the correct process is Exocytosis.

Answer:

Exocytosis