Which one of the following is composed mostly of the protein myosin?
A) thick filaments
B) thin filaments
C) all myofilaments
D) Z discs
E) light bands
A
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Cerebrospinal fluid is found between the dura mater and arachnoid.
Answer the following statement true (T) or false (F)
Angiotensin II elevates systemic blood pressure by
A) triggering arteriole constriction. B) promoting the release of ANP. C) inhibiting aldosterone. D) promoting the excretion of sodium. E) inhibiting ADH.
The urinary system does all of the following, except that it
A. regulates blood volume. B. regulates plasma concentrations of electrolytes. C. eliminates organic waste products. D. excretes excess albumen molecules. E. contributes to stabilizing blood pH.
Acetylcholine (ACh) always has an excitatory effect
Indicate whether the statement is true or false