Melanopsin Knockout Mice Have Difficulty

question 79

Multiple Choice

Melanopsin knockout mice have difficulty

• A) adjusting their circadian rhythms in response to changes in the daily light-dark cycle.
• B) seeing.
• C) sleeping on a regular schedule.
• D) displaying circadian rhythms.
• E) recognizing circadian signals.

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Definitions:

Na+

Sodium ions, essential for conducting nerve impulses and maintaining the balance of fluids in the body.

Plasma Membrane

The semipermeable membrane surrounding the cytoplasm of a cell, controlling the movement of substances in and out of the cell.

Potential Difference

Difference in electrical potential, measured as the charge difference across the plasma membrane.

Hyperpolarization

An increase in a cell's membrane potential, making it more negative and less likely to fire an action potential.