Which of the following valves is most often faulty in the heart?
a. the aortic semilunar valve
b. the tricuspid valve
c. the pulmonary semilunar valve
d. the mitral or bicuspid valve
Answer: d. the mitral or bicuspid valve
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A comparison of the two major body fluid compartments reveals that
A. two-thirds of the total fluid is outside our cells and one-third is within our cells. B. two-thirds of the total fluid is within our cells and one-third is outside our cells. C. half of the total fluid is within our cells and half is outside our cells. D. six-sevenths of the total fluid is within our cells and one-seventh is outside our cells. E. six-sevenths of the total fluid is outside our cells and one-seventh is within our cells.
Which of the following statements is incorrect?
A. Transcription occurs in the nucleus of the cell while translation occurs at the ribosome B. Translation involves messenger RNA which is read at the ribosome C. Transcription involves transfer RNA which is formed from a DNA template D. Transfer RNA brings amino acids to the ribosome to be added to the protein.
In the patellar tendon reflex arc, the patellar ligament is stretched, which stretches the quadriceps femoris muscle of the thigh. This reflex will cause the quadriceps femoris to ________ and the hamstrings to ________.
A. contract; contract B. relax; relax C. relax; contract D. contract; relax
The BMR (basal metabolic rate) can increase
A. during fasting. B. during pregnancy. C. as a result of decreased thyroid hormone production. D. while resting instead of studying for a test. E. during dieting.