If a cell could not properly incorporate proteins into its membrane , which of the following functions would be lost?  A Synaptic transmission of an action potential B. Diffusion of oxygen from the circulatory system to interstitial fuild.  C. Removal of the waste product CO2 from the cell to the interstitial fluid. O D. B And C

The sodium–potassium pumpa. helps establish an electrochemical gradient across the membrane.b. concentrates sodium on the outside of the membrane.c. uses a carrier protein and chemical energy.d. is present in the plasma membrane.e. All of these are correct.

When the membrane is at rest, the concentration gradient tends to draw sodium ions ___ the cell, and the electrical gradient draws them ___ the cell. a. into . . . out of b. into . . . into c. out of . . . into d. out of . . . out of

Select the correct pairing of a structure and the process it is associated with.    A. Schwann cells……..muscle contraction  B. ATP synthase…..electron transport chain  C. H+ pump……facilitated diffusion  D. Mitochondria…..protein synthesis

noitiues Before a vesicle is allowed to fuse with its target membrane, the proteins on the surface of the vesicle. proteins on the target membrane must recognize and bind to the Tethering.. Rab a. b. Rab ...... Tethering v- SNARES ... t-SNARES d. t-SNARES .. Rab

If a membrane protein in an intact erythrocyte reacts with a membrane-impermeable reagent, what can you conclude about the protein? A. It is a transmembrane protein. B. It is a peripheral membrane protein. C. At least one domain of the protein is located on the outer face of the membrane. D. It is not a plasma membrane protein.

Active transport must function continuously because__________.a. plasma membranes wear outb. cells must be in constant motionc. facilitated transport opposes active transportd. diffusion is constantly moving the solutes in the other direction

Which of the following is incorrect about membrane transport systems? a.   Glucose transport in red blood cells is a uniport system   b.   The Na+/K+ ATPase is an antiport system   c.   The H+/K+ ATPase is an active transport system   d.   The chloride-bicarbonate exchanger in erythrocytes is a uniport system

if a cell has a net positive charge inside and there is a net negative charge outside the cell, which of the following is correct (if the membrane is permeable to each substance and the concentration of each is the same inside and outside the cell)? a. negative ions will move into the cell b. positive ions will move into the cell c. neutral ions will move into the cell d. negative ions will move our of the cell

The proteins in the cell membrane that can open and close are called: O a. enzymes. O b.gated channel proteins. C. glycoproteins. d. both A and B.