When aldosterone is absent, Na+ reabsorption in the nephron is ________.
A. greatly decreased
B. greatly increased
C. unchanged
Answer: A
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What causes RDS (respiratory distress syndrome) in premature babies?
A. Muscles associated with respiration are not strong enough to expand the thorax. B. Respiratory centers of the brain are not functional until late in the fetal stage. C. The lungs have not yet produced adequate numbers of alveoli for efficient gas exchange. D. There is insufficient production of surfactant. E. Bronchioles are constricted due to excess production of mucus.
Bisphosphonates are drugs that slow the progress of
A) menopause. B) heart disease. C) rickets. D) osteoporosis.
The most abundant element in the human body, by weight, is ________
A) calcium B) nitrogen C) carbon D) oxygen E) hydrogen
Why would a person have anti-Rh antibodies present in their blood?
A. They are Rh-positive and were exposed to Rh-negative blood. B. An Rh-negative woman is carrying an Rh-positive fetus. C. An Rh-positive woman is carrying an Rh-negative fetus. D. A person can not have anti-Rh antibodies in their blood.