DNA or RNA? uracil
What will be an ideal response?
RNA
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In order to cause vasodilation of most vascular smooth muscle,
A) acetylcholine combines with muscarinic receptors. B) norepinephrine combines with alpha receptors. C) norepinephrine combines with ? 1 receptors. D) acetylcholine combines with nicotinic receptors. E) sympathetic stimulation is removed.
A muscle that would help flex the forearm is the:
A. pectoralis major. B. gluteus minimus. C. quadriceps. D. hamstring. E. brachioradialis.
Which of the following structures produces early blood cells and the gonadal tissues of the embryo?
A. The amnion B. The chorion C. The yolk sac D. The allantois E. The ectoderm
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