Calculate renal clearance of X given the following information: GFR = 100 mL/min, urine flow rate 118) = 5 mL/min, plasma concentration of X = 10 mg/mL, urine concentration of X = 50 mg/mL.
A) Y is freely filterable.
B) Y is reabsorbed.
C) Y is secreted.
D) Y is neither reabsorbed nor secreted. E) Y is not freely filtered.
Ans: B) Y is reabsorbed.
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Why do steroids take so long to generate change when they bind to intracellular receptors?
A) The intracellular receptors have very slow kinetics. B) The bound receptors affect gene transcription rates. C) The steroid receptor complex activates signal transduction pathways. D) The steroid receptor complex must then exit the cell to exert its effects.
Neural stem cells can be harvested from autopsies and stored, alive, in banks, whereas
neurons cannot, because A) neural stem cells have lower oxygen and energy requirements than neurons. B) neural stem cells have higher oxygen and energy requirements than neurons. C) neural stem cells have more globular shapes than neurons. D) people do not will them to science.
Cholinergic neurons secrete ________.
Fill in the blank(s) with the appropriate word(s).
As a result of the allergen-antibody reaction, mast cells release histamine.
Answer the following statement true (T) or false (F)