What type of transporter moves glucose into the cell against its concentration gradient? A. Na+-glucose antiport B. Na+-glucose symport C. Glucose uniport D. K+-glucose antiport E. K+-glucose symport
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- Which type of transporter chemically alters glucose during passage across the membrane?. a. ABC transporter b. Glucose phosphotransferase system c. hexokinaseThe Na+/glucose cotransporter in ION-GRADIENT-DRIVEN ACTIVE TRANSPORT, ________moves down its gradient and _______ against its gradient. Na+/K+ Na+/Na+ Na+/glucose glucose/glucoseWhich of these transport pathways require ATP? Select all that apply. A. Sodium-potassium pump B. Glucose transporter C. Osmotic diffusion D. Calcium pump
- Compare channels and transporters. Channels are __________, and transporters are __________. Select one: a. slower, more selective b. Less selective, slower c. faster, less selective d. slower, less selective e. more selective, fasterWhich of the following does not directly or indirectly require an energy source?a. primary active transportb. operation of the Na1/K1-ATPase pumpc. the mechanism used by cells to produce a calcium ion gradient across the plasma membraned. facilitated transport of glucose across a plasma membranee. secondary active transportInhibition of the Na,K-ATPase might reasonably result in which of the following: a.) gradual cellular accumulation of K+ b.) gradual decrease in cytoplasmic Na+ c.) cell shrinkage d.) hyperpolarization of the membrane potential e.) reduced activity of many secondary active transporters
- Movement of glucose down its concentration gradient into cells is facilitated by Select one: a. Active transport b. Diffusion across phospholipids c. Facilitated transport d. a protein that consumes ATP e. a protein that gets phosphorylatedThe proteins that constantly transport sodium ions outside the membrane is called A. Membrane pump B. Calcium-potassium pump C. Sodium-potassium pump D. Glucose-potassium pump E. Protein-potassium pump The process in the question above gets its energy from A. ADP B. ACT C. PTA D. ATP E. TPAWhat effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose? A) Permeability to glucose will increase. B) Permeability to glucose will decrese. C) Permeability to glucose will stay the same. D) Permeability will decrease initially then increase as the bilyaer fills with glucose.
- Which of the following statements about the sodium-potassium pump is correct? A) Both sodium and potassium move down their concentration gradient across the membrane B) 2 sodium ions are pumped out of the cell against their concentration gradient C) The sodium-potassium pump is a type of cotransport. D) ATP is used as an energy sourceWhich of the following will saturate as solute concentration increases? a. Transport of sucrose down its concentration gradient by the carrier protein GLUT2 b. Transport of chloride ions out of the endoplasmic reticulum and into the cytoplasm via a channel protein c. Engulfing of a pathogen by a white blood cell during an immune response d. All of the aboveWhich 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
