Which of the following is true about distribution of fast and slow-twitch fibers in the body?
A) Fast-twitch fibers are primarily found in long distance runners.
B) Slow-twitch fibers are usually more resistant to fatigue.
C) There is a clear separation of slow- and fast-twitch fibers in individual muscles.
D) Training does not influence the balance of fast- and slow-twitch fibers
Answer: B) Slow-twitch fibers are usually more resistant to fatigue.
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The indicators that are essential for human life include all of the following except ________
A) Coloring B) Respirations C) Temperature D) Heart rate
Fingernails are comprised of
A. epithelial and collagen fibers produced in the dermis. B. proteins secreted by the nail groove from the matrix. C. collagen deposited by the lunula and the matrix. D. thin, dead scaly cells.
Select the correct statement about renal mechanisms of acid-base balance.
A) The kidneys are not able to excrete phosphoric acid. B) Excreted hydrogen ions are unbound in the filtrate. C) Kidney tubule cells are able to synthesize bicarbonate ion. D) The kidneys are the most important mechanism for eliminating all bicarbonate ions.
Thyrotropin-releasing hormone targets the ________.
A. posterior pituitary B. thyroid gland C. anterior pituitary D. hypothalamus E. thyroid hormone