Ion Channels  in Cell Membranes

question 77

Multiple Choice

Ion channels  in cell membranes

• A)are nonspecific.
• B)are not affected by differences in electrical potential across the membrane.
• C)may open in response to binding a ligand.
• D)only allow ions to move from the extracellular fluid into the cell.
• E)only allow ions to move from the intracellular fluid out of the cell.

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Definitions:

Hypothalamus

A region of the brain that controls an enormous number of bodily functions including hunger, thirst, sleep, and emotional activity.

Consciousness

The condition in which a person is conscious and can reflect on their own being, feelings, ideas, environment, and life events.

Suprachiasmatic Nucleus

A region in the brain's hypothalamus responsible for controlling circadian rhythms, including the sleep-wake cycle.

Circadian Cycle

The biological clock of living beings, regulating physiological and metabolic processes in a roughly 24-hour cycle.