Assume that the transport of a particular amino acid across the plasma membrane is observed (1 ) to occur only down its concentration gradient and (2 ) to slow when a similar amino acid is added to the extracellular fluid. The movement of the amino acid

through the membrane is most likely by

A) osmosis.
B) diffusion.
C) facilitated diffusion.
D) active transport.
E) pinocytosis.


Answer: C

Anatomy & Physiology

You might also like to view...

Hardening of the arteries results in _______ and deposition of plaques in the walls of the arteries results in ______

A. atherosclerosis; arteriosclerosis B. atherosclerosis; phlebitis C. phlebitis; atherosclerosis D. phlebitis; arteriosclerosis E. arteriosclerosis; atherosclerosis

Anatomy & Physiology

A receptor that is wrapped in connective tissue is referred to as being ________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Angel, a white DSH, was given a/an ____________ to prevent vomiting

Fill in the blank(s) with correct word

Anatomy & Physiology

You should be able to hold your breath longer than normal after you hyperventilate (breathe rapidly for a while) because hyperventilating

decreases blood oxygen levels. decreases blood carbon dioxide levels. increases blood oxygen levels. increases blood carbon dioxide levels.

Anatomy & Physiology