Residual volume is
A. air remaining in the alveoli after very deep exhalation.
B. air that remains in the passageways but not used for gas exchange.
C. maximum volume of air moved in and out during a single deep breath.
D. air moved in and out with each breath.
Answer: A
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Which of the following placental hormones helps direct maternal use of fatty acids?
a. placental lactogen b. chorionic gonadotropin c. Progesterone d. estrogen e. PTHrp
Aziz goes to the doctor and has a blood cholesterol test done. The results show that his total cholesterol is slightly high, his HDLs are very high, and his LDLs are low. Aziz is alarmed by the numbers because his father had atherosclerosis. Aziz's doctor gives him more information. Which of the following statements is the doctor likely to make?
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A decrease in insulin production:
a. usually causes type 1 diabetes mellitus b. will stimulate the release of growth hormone c. is usually the cause of type 2 diabetes mellitus d. both A and C above