Osteoporosis is most common in elderly women because of the lack of ________, which would otherwise inhibit ________
A) dietary calcium; estrogen production
B) exercise; osteoblast activity
C) osteoblasts; osteoclast activity
D) parathyroid hormone; osteocyte activity
E) estrogen; osteoclast activity
E
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Although skeletal muscle fibers cannot divide, new muscle fibers are produced through the division of ________, which are mesenchymal cells that persist in adult skeletal muscle.
Fill in the blank(s) with the appropriate word(s).
The sympathetic division of the ANS includes which of the following?
A) paired collateral ganglia anterior to the spinal column B) three segmentally arranged sympathetic chains C) two suprarenal medullae D) All of the answers are correct. E) None of the answers are correct.
What is the function of keratin, a protein found in the epidermis of the skin?
A.) Protection B.) Oxygen binding C.) Sensation D.) Temperature regulation E.) Waste elimination
Which artery is missing in the following sequence?Tracing the blood from the heart to the right hand, blood leaves the heart, passes through the ascending aorta, aortic arch, right subclavian artery, axillary and brachial arteries, either the radial or ulnar arteries and palmar arches to arrive at the hand.
A. Cephalic B. Left subclavian artery C. Jugular D. Brachiocephalic E. Right common carotid