The Cyclical Shedding of the Lining of the Uterus Is

question 54

Multiple Choice

The cyclical shedding of the lining of the uterus is:

• A) ovulation.
• B) menstruation.
• C) gestation.
• D) parturition.

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Definitions:

Cotransport

The active transport of a substance from a region of low concentration to a region of high concentration by coupling its transport to the transport of a substance down its concentration gradient.

Concentration Gradient

A gradual change in the concentration of solutes in a solution as a function of distance through a solution.

ATP

Adenosine Triphosphate, a molecule that stores and transfers energy within cells, crucial for many cellular processes.

Facilitated Diffusion

The passive transport of ions or molecules by a specific carrier protein in a membrane. As in simple diffusion, net transport is down a concentration gradient, and no additional energy has to be supplied. Compare with diffusion and active transport.