________ account for 98.5% of the body's weight.
A. Carbon, oxygen, hydrogen, nitrogen, calcium, and phosphorus
B. Carbon, nitrogen, hydrogen, sodium, potassium, and chlorine
C. Carbon, oxygen, hydrogen, sodium, potassium, and chlorine
D. Carbon, oxygen, iron, sodium, potassium, and chlorine
E. Carbon, oxygen, hydrogen, nitrogen, sodium, and potassium
Answer: A
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How fast would the heart beat if the AV node were diseased, as occurs in total heart block?
A. More than 90 beats per minute B. An average of 75 beats per minute C. 40 to 60 beats per minute D. 20 to 40 beats per minute E. The heart rate would be very erratic and rates would fluctuate widely.
Which of the following structures produces a precursor to hormonal vitamin D, important for Ca2+ regulation?
A. Stomach B. Heart C. Kidney D. Skin
Urine volume ____ when ADH (antidiuretic hormone) secretion decreases
A. increases B. decreases C. is not affected D. declines E. None of these choices are correct.
which describes the action of the diaphragm when it contracts?
a) during expiration, it elevates the floor of thorax b) during inspiration, it elevates and protracts the ribs c) during expiration, it depresses and retracts the ribs d) during inspiration, it depresses the floor of thorax