Cell Membranes Have Distinct Inside and Outside Faces

question 25

Multiple Choice

Cell membranes have distinct inside and outside faces. Which of the following statements is the most plausible explanation for the asymmetrical nature of the two layers of the membrane?

• A) Cell membranes form a border between adjacent cells in tightly packed tissues such as epithelium.
• B) Cell membranes communicate signals between different cell types.
• C) The two layers of a cell membrane face different environments and carry out different functions.
• D) Proteins only function on the cytoplasmic side of the cell membrane.

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Definitions:

Lobotomy

A surgical procedure used historically to treat mental illness, involving severing connections in the brain's prefrontal cortex, now widely discredited.

Pharmacotherapy

The treatment of diseases through the administration of drugs.

Cingulotomy

A neurosurgical procedure that targets the cingulate gyrus to treat certain psychiatric disorders, such as OCD and major depression, by severing connections in the brain.

Troublesome

Causing difficulty or annoyance; often used to describe situations, behaviors, or phenomena that are problematic.