Bulk movement of water across plasma membranes and the exchange of oxygen from blood into cells are similar in that the method of transport is by
A) facilitated transport.
B) endocytosis.
C) diffusion.
D) active transport.
E) sodium-potassium pumps.
C
You might also like to view...
Which of the following amino acids is/are negatively charged at physiological pH?
A. serine B. aspartate C. glutamate D. serine, aspartate, and glutamate E. aspartate and glutamate
Fine sediment bottoms with silt support a variety of
a. filter feeders. b. suspension feeders. c. epifauna. d. infauna. e. nekton.
. coli strains toxic to humans live in the intestine of ____ without sickening them
I. birds and frogs II. goats and sheep III. cattle and deer
a. I only b. I and II c. II and III d. I and III e. I, II, III
X-ray crystallography showed that DNA:a
had the bases in the center of the molecule. b. had the sugars and phosphates on the outside of the molecule. c. was a very long molecule. d. was made of 2 strands. e. was a helix.