A patient has been receiving immunosuppressive doses of glucocorticoids for 6 months. At the end of this therapy, the dose of the hormone must be slowly tapered down over a period of weeks. This is due to:
A. adrenal atrophy
B. pituitary hypertrophy
C. upregulation of glucocorticoid receptors
D. elevated ACTH levels
E. increased circulating CBG levels
ANS: A
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The mucous membranes of the nasal cavity moisten inspired air to ________ humidity.
A. 40% B. 60% C. 80% D. 100%
When myosin moves along the actin, it goes through cycles of binding and releasing (duty cycle). How does myosin keep from losing its place on the actin when it releases?
A) The time of the duty cycle is large (.99) so that it is only unattached a short time. B) The myosin is still attracted to the actin by weak electrostatic forces that prevent it from moving too far away during release. C) The myosin is attached to the actin by another protein that it uses as a safety line to prevent it from slipping too far back. D) The myosin is arranged in dimers so that when one releases, the other is bound.
A surgeon opens her patient by cutting the integument parallel to the cleavage lines of the dermis (tension lines). This will result in ________
A) slowed healing and grater scaring B) faster healing of the skin and less scaring C) greater chance of infection D) less chance for infection
Which of the following phases of the uterine cycle begins with the end of menstruation?
a. The secretory phase b. The follicular phase c. The luteal phase d. The proliferative phase