Which of the following correctly traces blood flow from the renal cortex to the renal vein?
A. Interlobular v. > interlobar v. > segmental v. > renal v.
B. Arcuate v. > interlobar v. > segmental v. > renal v.
C. Interlobar v. > interlobular v. > arcuate v. > renal v.
D. Segmental v. > arcuate v. > interlobar v. > renal v.
E. Interlobular v. > arcuate v. > interlobar v. > renal v.
E. Interlobular v. > arcuate v. > interlobar v. > renal v.
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When the concentration of carbon dioxide decreases in the tissue, the precapillary sphincters __________ causing blood flow to the tissue to _________.
A. contract; decrease B. contract; increase C. relax; decrease D. relax; increase E. close; remain the same
Which structures create the blood brain barrier (BBB)?
A) Desmosomes and tight junctions between astrocytes and ependymal cells that form the capillary walls B) Gap junctions between ependymal cells and endothelial cells that form the capillary walls C) Gap and tight junctions between astrocytes and endothelial cells that form the capillary walls D) Gap junctions between endothelial cells that form the capillary walls E) Tight junctions between endothelial cells that form the capillary walls
A drug that blocks the action of the hormone cholecystokinin would affect
A) the amount of bile produced by the liver. B) the level of intestinal gastrin. C) the composition of pancreatic secretions. D) secretions of the duodenal glands. E) All of the answers are correct.
Which statement regarding control of pancreatic secretion is correct?
a. gastrin stimulates release of neutralization solution. b. CCK stimulates release of enzymes. c. secretin stimulates release of bicarbonate. d. both (a) and (b) above. e. both (b) and (c) above.