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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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?
A. Neither LDL nor HDL are involved in cholesterol regulation. B. It is preferable to have a high concentration of high-density lipoproteins (HDLs) in the plasma because HDLs operate to remove cholesterol from the peripheral tissues and carry it to the liver, which secretes it into the small intestine. C. Plasma cholesterol concentration has no relationship to atherosclerosis. D. It is preferable to have equal concentrations of LDL and HDL. E. It is preferable to have a high concentration of low-density lipoproteins (LDLs) in the plasma because LDLs operate to remove cholesterol from the peripheral tissues and carry it to the liver, which secretes it into the small intestine.
Modified amino acids that act as hormones are referred to as ________ amines
Fill in the blank with correct word.
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
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