Which Statement Is True About Up-Regulation and Down-Regulation

question 63

Multiple Choice

Which statement is true about up-regulation and down-regulation?

• A) Up-regulation is the decrease in the number of receptors for a given hormone and down-regulation is the increase in the number of receptors for a hormone.
• B) Up-regulation is the increase in the amount of hormone and down-regulation is the decrease in the amount of hormone.
• C) Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the number of receptors for a hormone.
• D) Up-regulation is the increase in the number of receptors for a given hormone and down-regulation is the decrease in the amount of hormone.

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Definitions:

Endocrine System

A network of glands in the body that produce hormones, which regulate metabolism, growth and development, tissue function, and mood among other functions.

Nervous System

The complex network of nerve cells and fibers that transmits signals between different parts of the body, coordinating its activities.

Corpus Callosum

A broad band of nerve fibers joining the two hemispheres of the brain, facilitating communication and integration of functions between them.

Lobe

A distinct part of an organ, separated by fissures, especially referred to in the context of the brain and lungs.