Which structure in the accompanying figure is responsible for allowing entire regions of cells to respond to a single
stimulus?
a. A
b. B
c. C
d. D
e. E
ANSWER: c
You might also like to view...
The tendency of water molecules to form hydrogen bonds is
A. evaporation. B. hydrolysis. C. cohesion. D. condensation. E. adhesion.
Cardio-cerebral resuscitation (CCR) differs
from CPR in what way?
a. in CCR, an electrical shocking device is used but not in CPR b. in CPR, an electrical shocking device is used but not in CCR c. in CCR, mouth-to-mouth resuscitation is used but not in CPR d. in CPR, mouth-to-mouth resuscitation is used but not in CCR e. CCR is not as effective as CPR
Which is false regarding passive transport?
a. It depends on concentration or electrical gradients. b. It involves weak binding between solute and protein. c. It requires an energy input. d. It depends on protein shape change. e. None of these are false.
Recently, consumption of trans fatty acids has been linked to high blood cholesterol levels and increased risk of heart disease. The food industry has responded by decreasing use of "trans fats."
Consider the following questions: (a) How do the structures and transition temperatures of trans, cis, and saturated fatty acids differ, and what are the effects on membrane fluidity? (b) Are trans fatty acids abundant in nature? (c) The major source of trans fats is hydrogenated oils. (The trans fats are produced by a side reaction during the hydrogenation process.) Why has the food industry used synthetically produced hydrogenated oils? What will be an ideal response?