Dipping down into the mucosal surface between the villi are shallow invaginations known as the islets of Langerhans
a. True
b. False
Indicate whether the statement is true or false
False
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_____________ is the general term for all cellular contents located between the plasma membrane and the nucleus
Fill in the blank with correct word.
Sympathetic stimulation of the kidney results in
A. constriction of afferent arterioles and an increase in the surface area of the glomerulus. B. constriction of afferent arterioles and a decrease in the surface area of the glomerulus. C. dilation of afferent arterioles and an increase in the surface area of the glomerulus. D. dilation of afferent arterioles and a decrease in the surface area of the glomerulus.
Which of the following blocks voltage-gated sodium channels?
A) lidocaine B) tetrodotoxin C) pufferfish toxin D) tetrodotoxin, pufferfish toxin and lidocaine
Most veins below the diaphragm drain into the:
A) superior mesenteric vein. B) superior vena cava. C) hepatic vein. D) inferior vena cava.