13. Carrier-mediated transport is also called A. facilitated diffusion B. active transport C. exocytosis D. endocytosis E. phagocytosis. 14. Osmosis can only occur if water travels through the A. cell wall B. semi-permeable membrane C. vacuole D. ER E. cytoskeleton. 15. The type of movement of molecules that is specific and passive, and which becomes saturated if all of the protein carriers are in use is A. exocytosis B. facilitated diffusion C. active transport D. endocytosis E. osmosis. 16. The type of movement that is specific and requires carrier molecules and energy is A. exocytosis B. facilitated diffusion C. active transport D. endocytosis E. osmosis. 17. Cholesterol functions in the plasma membrane to A. transport ions B. serve as an energy molecule C. maintain fluidity D. mediate steroid action E. maintain hypertension.
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Step 1: Carrier-mediated transport is also called facilitated diffusion. Show more…
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Active transport differs from facilitated diffusion in that: A. Ions are not transported via active transport, only by facilitated diffusion. B. Active transport requires a protein component, whereas facilitated diffusion occurs by simple diffusion through the plasma membrane. C. Active transport involves a conformational change in the transport molecule. D. Active transport involves the transport of molecules up their concentration gradient. Question 2: Facilitated diffusion differs from passive diffusion in that facilitated diffusion is: A. Against the concentration gradient. B. Mediated only by a protein channel. C. Mediated only by a protein carrier. D. Mediated by a protein carrier or channel. Question 3: Mutations in the internalization signal of endocytic receptors prevent their interaction with: A. Adaptor proteins. B. Dynamin. C. Caveolin. D. Clathrin.
Sri K.
When a plant cell is placed in surroundings containing a greater solute concentration than inside the cell, what happens to the cell? A. plasmolysis. B. the cell becomes flaccid. What type of transport process is the movement of a solute across a membrane, against its concentration gradient, and which requires energy? A. Active transport. B. Diffusion. C. Osmosis. D. facilitated diffusion. What type of transport process is the passive movement of a solute across a membrane, down its concentration gradient, and which requires transport proteins? A. Active transport. B. Diffusion. C. Osmosis. D. facilitated diffusion. What type of transport process is the passive movement of a solute across a membrane and down its concentration gradient? A. Active transport. B. Diffusion. C. Osmosis. D. facilitated diffusion.
Adi S.
Facilitated diffusion is a. the random movement of a substance from a region of higher concentration to a region of lower concentration. b. the movement of water across the plasma membrane. c. the movement of molecules across the plasma membrane against a concentration gradient with the aid of a carrier protein and energy supplied by the cell. d. the movement of a substance from a region of higher concentration to a region of lower concentration with the aid of a membrane protein.
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