How Long Is the Average Menstrual Cycle

question 202

Multiple Choice

How long is the average menstrual cycle?

• A)30 days
• B)40 days
• C)28 days
• D)20 days

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Definitions:

Voltage-Sensitive

Voltage-sensitive describes membranes or proteins that respond to changes in electrical potential across them, crucial for nerve signal transmission and muscle contraction.

Sodium Channels

Specialized protein molecules in cell membranes that allow the passage of sodium ions into and out of the cell, playing a crucial role in generating and conducting electrical signals.

Graded Potentials

Changes in electrical charge across the cell membrane that vary in size and are not propagated in an all-or-none manner.

Channels

Structures or means through which substances or signals are able to pass or be conveyed in a biological system.