Osteoporosis is most common in elderly women due to their lack of what?
A. Estrogen
B. Osteoclast activity
C. Parathyroid hormone
D. Dietary calcium
E. Vigorous exercise
A. Estrogen
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Which area(s) of the brain exert(s) control over the autonomic nervous system?
1. cerebrum 2. cerebellum 3. hypothalamus 4. pons 5. medulla 6. thalamus A) 1, 2, 3, 5 B) 1, 3, 5 C) 1, 3, 4, 5 D) 1, 2, 3, 4, 5, 6 E) 2, 3, 4, 5
Sphincter, or dilator, muscles are special circular muscles that open and close to control the passage of substances.?
Indicate whether the statement is true or false
Circulation to the spleen demonstrates a(n)
A. simple pathway, as one artery delivers blood and one vein drains the organ. B. simple pathway, as its two capillary beds are separated by a portal vein. C. anastomosis, as one artery delivers blood and one vein drains the organ. D. anastomosis, as its two capillary beds are separated by a portal vein.
Glucose and amino acids are reabsorbed by
A) cotransport. B) symport with sodium. C) countertransport. D) diffusion.