What structures of the cardiovascular system are innervated by the sympathetic nervous system, but are NOT by the parasympathetic nervous system?
A) SA node and AV node
B) SA node, AV node, and bundle of His
C) arteriolar smooth muscle
D) arteriolar smooth muscle and venous smooth muscle
E) ventricular myocardium, arteriolar smooth muscle and venous smooth muscle
Answer: E) ventricular myocardium, arteriolar smooth muscle and venous smooth muscle
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The movement of molecules across a membrane from an area of lower concentration to an area of higher concentration with the expenditure of energy is called
A. active transport. B. passive diffusion. C. osmosis. D. facilitated diffusion.
The nicotinic ACh receptor is made up of ___________ subunits.
A) zero B) twenty-seven C) 140 D) five
What structure separates the inner and outer layers that form sponges?
a. spicules b. choanocyte c. osculum d. mesohyl
Organisms in the kingdoms Eubacteria and Archaebacteria were previously grouped in a kingdom called
a. Animalia b. Fungi c. Monera d. Eukarya