The plasma membrane
a. appears under an electron microscope as a double dark line with a light space between
b. is composed primarily of a double layer of protein molecules with cholesterol molecules interspersed between them
c. has a hydrophilic region between two hydrophobic regions
d. has all of the above characteristics
e. does not exhibit any of the above characteristics
A
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Most of the H+ excreted in the urine is bound to bicarbonate ion.
Answer the following statement true (T) or false (F)
Which statement regarding glycogen is correct?
A. Glycogen contains more potential energy for humans than cellulose. B. Glycogen, but not cellulose, is a polysaccharide eaten and digested by humans. C. Glycogen can be comprised of any monosaccharides. D. Glycogen contains more potential energy for humans than the carbohydrates found in starch.
At the point of equilibrium, during diffusion, there is no further movement of any molecules.
a. true b. false
Which of the following muscles is NOT a member of the hamstrings group?
A) biceps femoris B) semimembranosus C) semitendinosus D) vastus intermedius