After embryonic folding, the _____ sac becomes reduced in size and eventually gives rise to the first blood cells and stem cells that give rise to gametes.
Fill in the blank(s) with the appropriate word(s).
yolk
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What separates the hemispheres of the cerebrum?
A. Longitudinal fissure B. Central sulcus C. Lateral fissure D. Corpus callosum
The various types of epithelium are classified by
A. the number of cell layers and size of the cells. B. the shape of cells and number of cell layers. C. the size and shape of cells. D. the size and location of cells. E. function and size of cells.
Which of the following describes an antiport system on the basal side of renal tubule cells?
A) It exchanges K+ for Na+. B) It transports CO2 from the blood into the tubule cells. C) It exchanges H+ for Na+. D) It transports bicarbonate from the tubular fluid back into the tubule cells. E) It transports H+ in both directions across the epithelium.
Clinically, which class of hormone is more likely to be administered orally since it will pass through biological membranes without being digested in the gut?
A. Peptide hormones B. Steroid hormones