Examlex
(Close-Up) Which of the following statements is true?
Progesterone
Progesterone is a steroid hormone released by the corpus luteum that regulates the menstrual cycle and is crucial for maintaining pregnancy.
Helper T Cells
A type of white blood cell that plays a critical role in the immune system by helping activate the cells that fight infection.
HIV
Human Immunodeficiency Virus, a retrovirus that attacks the immune system, leading to AIDS.
Menstrual Cycle
The monthly series of changes a woman's body goes through in preparation for the possibility of pregnancy.
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