A human cell membrane is comprised of the following except which one?
a. lipids
b. proteins
c. carbohydrates
d. nucleic acids
Ans: d. nucleic acids
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In the pumping action of the heart:
a. atrial systole follows ventricular systole b. atrial systole precedes ventricular systole c. atrial and ventricular systole occur at the same time d. none of the above
________ hearing loss occurs because of damage to the structure of the inner ear.
Fill in the blank(s) with the appropriate word(s).
Which of the following factors would produce the greatest change in blood flow?
a. doubling the radius of the vessel. b. doubling the difference in the pressure gradient within the vessel. c. doubling the viscosity of the blood. d. doubling the length of the vessel. e. halving the viscosity of the blood.
The _____ is attached to the large intestine and assists in development of immunity. Select one:
a. Peyer patches b. appendix c. spleen d. thymus