How do the lymphatic and immune systems contribute to osteoporosis?
A. Excessive smoking lowers estrogen levels, which increases bone loss.
B. Immune cells resist infections and release chemicals that promote tissue repair.
C. Calcium ions released from the bones are excreted.
D. Lack of exposure to sunlight reduces vitamin D production and decreases calcium absorption.
E. Decreased estrogen levels following menopause contribute to the disease.
B
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Which accessory gland neutralizes the acidity of semen before it is ejaculated?
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