If a substance has a plasma concentration of 150 mg/ml and a urine concentration of 1.7 mg/ml, and the urine flow rate is 1.3 ml/min, what is the clearance of this substance?
a. 15 ml/min
b. 196 ml/min
c. 0.4 ml/min
d. Cannot be determined with these data
e. None of the above
E
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Marissa is an avid marathon runner, and she trains incessantly. She has slimmed down so that she is now underweight for her height and has very little fat tissue. One would expect Marissa to
A) have heavy menstrual flows. B) ovulate continuously. C) be amenorrheic (have no monthly menstrual flow). D) have painful menstrual cramps. E) show elevated levels of FSH.
The medial pole of the ovary is attached to the uterus by which ligament?
A. Suspensory ligament B. Mesovarium C. Broad ligament D. Ovarian ligament
Which structure is transiently formed from microtubules during cell division?
a. flagella b. cilia c. mitotic spindle d. microfilaments e. none of the above
________ lacks the capacity to remember a pathogen or react differently to it in the future, whereas ________ utilizes memory cells to adapt to a given pathogen and ward it off more easily in the future
A) Adaptive immunity; specific immunity B) Nonspecific resistance; adaptive immunity C) Adaptive immunity; nonspecific resistance D) A natural killer cell; a cytoxic T cell E) Nonspecific resistance; cytotoxicity