Question

Which of the following cell types use exocytosis to discharge materials from the cell?

1) Neurons
2) Muscle cells
3) Endocrine cells
4) All of the above

Answer 1

All of the above cell types, including neurons, muscle cells, and endocrine cells, use exocytosis to release materials from the cell. This process involves vesicles fusing with the plasma membrane and discharging their contents into the extracellular space.

Step-by-step explanation:

The cell types that use exocytosis to discharge materials from the cell are neurons, muscle cells, endocrine cells, and indeed, virtually all cells, including those in the immune system. Neurons utilize exocytosis to release neurotransmitters at synapses, muscle cells can release signaling molecules, and endocrine cells release hormones that are sent throughout the body. Exocytosis involves vesicles that fuse with the plasma membrane to release their content into the extracellular space and is crucial for the processes like secretion of digestive enzymes, histamine, hormones, neurotransmitters, and components of the extracellular matrix.