Imagine a cell can perform exocytosis, but only minimal...

Name: Problem 20, Chapter 5: Biology
Uploaded: 2021-01-11T20:27:34-08:00
Duration: 2 min 15 s
Channel: Caroline Jones
Description: Imagine a cell can perform exocytosis, but only minimal endocytosis. What would happen to the cell? a. The cell would secrete all its intracellular proteins. b. The plasma membrane would increase in size over time. c. The cell would stop expressing integral receptor proteins in its plasma membrane. d. The cell would lyse.

Imagine a cell can perform exocytosis, but only minimal endocytosis. What would happen to the cell? a. The cell would secrete all its intracellular proteins. b. The plasma membrane would increase in size over time. c. The cell would stop expressing integral receptor proteins in its plasma membrane. d. The cell would lyse.

Imagine a cell can perform exocytosis, but only minimal endocytosis. What would happen to the cell?
a. The cell would secrete all its intracellular proteins.
b. The plasma membrane would increase in size over time.
c. The cell would stop expressing integral receptor proteins in its plasma membrane.
d. The cell would lyse.

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Key Concepts

Exocytosis

Exocytosis is a cellular process where vesicles fuse with the plasma membrane to release their contents outside the cell, simultaneously adding the vesicle's membrane to the cell's plasma membrane. This mechanism is crucial for processes such as the secretion of proteins and neurotransmitters, and for adding membrane components during growth and repair.

Endocytosis

Endocytosis is the process by which cells take in external substances by engulfing them with their plasma membrane, forming vesicles that internalize extracellular materials. This mechanism is vital for nutrient uptake, receptor recycling, and maintaining the balance of the plasma membrane composition and size.

Plasma Membrane Homeostasis

Plasma membrane homeostasis refers to the dynamic balance between the processes of exocytosis and endocytosis, which ensures that the overall membrane surface area and composition remain stable. An imbalance—where exocytosis predominates over endocytosis—leads to an accumulation of membrane material and an increase in the plasma membrane's surface area over time.

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