Which molecule would you predict moves through a lipid bilayer most rapidly without the help of a transport protein?
A. C2H5OH
B. C4H10
C. CH3OH
D. NH2SO2CH3
E. C6H12O6
Answer: B
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There are still many unanswered questions about evolution
Indicate whether the statement is true or false.
The organ of Corti is
a. a chemoreceptor. b. a mechanoreceptor. c. a photoreceptor. d. a nociceptor. e. all of these.
In a __________, water or some nutrient moves from
an environmental reservoir, through organisms, then back to the environment. Fill in the blank(s) with the appropriate word(s).
Skin is able to prevent most microorganisms from entering the body by
A) producing alkaline secretions. B) having keratin in the uppermost layer. C) production of antibodies. D) the adhesion junction in the skin preventing bacteria from entering. E) releasing macrophages on the skin surface.