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Phys Exam 4 Quiz Questions

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the anatomical structure of the spermatozoan that is important in producing the enzymes that hydrolyze the zona pellucida of the ovum is
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Terms in this set (20)
the anatomical structure of the spermatozoan that is important in producing the enzymes that hydrolyze the zona pellucida of the ovum is
acrosome
the life expectancy of sperm in the female genital tract is
24-48 hours
the phosphodiesterase-5 (PDE-5) inhibitors are used to treat male impotence. these drugs work by what mechanism?
protecting cGMP from being broken down
the cells of the follicle that are capable of producing androgens are ________ cells & these androgens are converted to estrogens in __________ cells, by the action of the enzyme aromatase
thecal, granulosa
the hormones most responsible for the LH surge & ovulation in a normal woman are
estradiol & GnRH
at what time is the second meiotic division of oogenesis completed in the human female?
upon fertilization
a 20 year old woman who was administered a gonadotrope-stimulating drug responded with an increase in plasma LH levels but FSH levels remained low. levels of which of the following hormones would also be expected to remain unaffected by the drugs?
estradiol
a 23 year old woman who has been training for a marathon presents with secondary amenorrhea. a pregnancy test is negative, so the woman is started on the orally active opioid blocker naltrexone, which restores ovulation & menses. ovulation is caused by a sudden increase in the secretion of which of the following hormones?
LH
negative feedback on FSH release from the anterior pituitary in men that results in a reduction in estradiol production is due to which hormone?
inhibin
a physician notes that an underweight teenage girl's tooth enamel is eroded. a basic metabolic panel reveals hypokalemia & metabolic alkalosis, suggestive of an eating disorder & repeated purging. which of the following would be consistent with such a diagnosis?
hypoventilation
a patient has suffered from persistent diarrhea lasting a week. which of the following would be decreased in this patient?
filtered load of bicarbonate ion
a 28 year old woman with SLE is brought to the ED after developing hypokalemic paralysis. she is diagnosed with renal tubular acidosis caused by an autoimmune response that damages the H+ ATPase on the distal nephron. which of the following laboratory measurements will most likely be normal in this patient?
anion gap
which condition has the highest excretion of NH4+?
diabetic ketoacidosis
nicotinic receptors are found on which of the following cells?
sympathetic ganglion cells
which structure located in the brainstem plays a major role in determining the direction from which a sound originates?
superior olivary nucleus