Which of the following is correct concerning the location of the kidneys?
A) They are against the anterior wall of the abdominal cavity.
B) Their upper borders are about at the level of the third lumbar vertebra.
C) They are located behind the parietal peritoneum.
D) The right kidney is usually higher than the left one.
C
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The most posterior chamber of the heart is the
A. right atrium. B. right ventricle. C. left atrium. D. left ventricle.
In the heart, activation of these receptors increases heart rate
A. a1 B. a2 C. b1 D. b2
Which of the following DNA base pairs is complementary?
A) adenine and guanine B) guanine and uracil C) thymine and guanine D) cytosine and adenine E) adenine and thymine
Which of the following events occurs on the postsynaptic membrane?
A. acetylcholine production B. rapid degradation of acetylcholine C. release of neurotransmitter D. neurotransmitter combines with a receptor molecule E. release of calcium ions