What are attributes of oral contraceptives? (Check all that apply.)A) They contain a progesterone and sometimes an estrogen analogue.B) The progesterone is in the 21-day pills, and the estrogen is in the 7-day pills.C) They help protect against ovarian and endometrial cancer.D) They are appropriate for use by smokers over age 35.E) They have a low failure rate of only 1% to 5% a year.F) They act by inhibiting LH and FSH secretion, inhibiting ovulation.
What will be an ideal response?
A, C, E, F
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Messenger RNA is:
a. information copied or transcribed from DNA. b. comprised of rRNA. c. comprised of tRNA. d. referenced by DNA. e. used by cells to communicate with each other.
The secretion of which hormone decreases when calcium blood levels increase?
a. calcitonin b. parathyroid hormone c. thyroid hormone d. epinephrine e. norepinephrine
Which is inncorrect concerning ulcers?
A. more than 90% are in the duodenum B. they may occur when excess acid damages tissue C. susceptibility is increased by an infection with helicobacter pylori. D. antibotics can cure an ulcer E. uclers can occur if bile fails to neutralize the acids chyme that enter the duodenum.
Which of the following antimicrobials does not match its potential shortcomings?
A) Macrolides: This narrow-spectrum drug must be administered parenterally. B) Phenicols: Has a narrow therapeutic index and is associated with bone marrow toxicity that results in aplastic anemia. C) Tetracyclines: Induce photosensitivity, causes detrimental effects on bones and teeth in children younger than 8 years old, and are associated with an increased risk of Clostridium difficile infection D) Aminoglycosides: Are known to cause irreversible hearing loss when administered other than topically. E) Lincosoamides: One common lincosoamide is associated with pseudomembranous colitis caused by Clostridium difficile.