Menopause:
A. is the cessation of menstrual cycles.
B. results in high plasma levels of estrogens.
C. occurs as a result of cessation of gonadotropin secretion.
D. is the cessation of ovulation while a baby is nursing.
E. is the pause in development of ovarian follicles occurring between the birth of a baby girl and when she reaches puberty.
A
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The functional connection between a neuron and a skeletal muscle fiber is a
A) synapse. B) neuroma. C) fascia. D) dendrite.
Variations in hair color arise from differing amounts of ________.
A. keratin and melanin B. eumelanin and pheomelanin C. carotene and hemoglobin D. carotene and collagen E. collagen and elastic filaments
Platelets normally do not adhere to the smooth endothelial lining of blood vessels, but they do stick to damaged vessels
a. True b. False Indicate whether the statement is true or false
The blood-brain barrier
1.results from microglia signaling adjacent cells of the brain capillaries to form tight junctions. 2.prevents most water soluble substances from moving between the blood and the interstitial fluid of the brain. 3.allows glucose to diffuse across the capillary walls. 4. allows changes in plasma potassium levels to cause corresponding changes in brain interstitial fluid potassium levels. 5. All of these are correct