What chemical is necessary for the transformation of angiotensin-I (A-I) into active angiotensin-II (A-II)?
A) angiotensinogen B) atrial natriuretic peptide (ANP)
C) angiotensin-converting enzyme (ACE) D) renin
Answer: C
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During fertilization, sperm bind to specific receptor sites on the surface of the
a. zona pellucida. b. corona radiata. c. plasma membrane of the ovum. d. polar body. e. oviduct.
One feature that helps provide fast energy to a muscle cell is the presence of granules containing the complex carbohydrate
A. creatine phosphate. B. myoglobin. C. glycogen. D. nebulin. E. hemoglobin.
The stratum ____ is the outermost layer of the skin
a. germinativum b. corneum c. spinosum d. granulosum
The genotype WW is best described as ________.
A. homozygous recessive B. heterozygous dominant C. heterozygous recessive D. homozygous dominant E. homorecessive