If a mutation in a sodium channel in an Intestinal epithelial cell caused a marked decrease In the concentration gradient of sodium across the plasma membrane, which of the following would you expect to observe? a decrease in Na/K ATPase activity. an increase in the movement of glucose across the basolateral membrane to the extracellular space an increase in sodium/glucose co-transport into the cell across the apical membrane a decrease in cytoplasmic glucose concentration

Which of the following statements best describes the absorption of glucose?     Absorption of glucose requires digestion by aminopeptidases on absorptive epithelial microvilli before absorption of the carbohydrate smaller units such as glucose.     Absorption of glucose requires an electrochemical gradient of high extracellular K+ set up by primary active transport.     Absorption of glucose occurs at villi and crypts mainly in the duodenum where amylases break down carbohydrates into glucose.      Absorption of glucose occurs at the transporting epithelia in the small intestine and is a secondary active transport that requires a Na+gradient

A chemical called ouabain inhibits the Na/K ATPase (the sodium-potassium pump).  What would happen to glucose concentrations in the extracellular fluid (not the gut lumen) after exposure to ouabain, and why?   Ouabain would cause intracellular sodium levels to rise, which would reduce the active transport of glucose from the gut, thereby decreasing glucose in the extracellular fluid. Ouabain would cause extracellular sodium levels to rise, which would reduce the active transport of glucose from the gut, thereby decreasing glucose in the extracellular fluid. Ouabain would cause intracellular sodium levels to rise, which would reduce the active transport of glucose from the cell to the extracellular fluid. Ouabain would cause intracellular sodium levels to rise, which would enhance the active transport of glucose from the gut, thereby increasing glucose in the extracellular fluid.

Which is a correct statement about the Na+/K+ transporter (pump), and its cytology and cellular role?     It is found the basal side of intestinal epithelial cells, pumping Na+ out of the cell into the blood.     It is found on the plasma membrane of neurons, pumping Na+ into axons from the blood.     It is found on the membrane of the lysosome, pumping K+ into the lumen of the lysosome.     It is found on the apical side of intestinal epithelia, pumping K+ into the lumen of the intestine.

How does the Na+/ K+ ATPase play a role in glucose transport?     phosphorylates GLUT1 to activate it     pumps Na+ across plasma membranes into cytoplasm to activate the sodium-glucose transporter     pumps Na+ across basal plasma membrane to the outside of intestinal cells so that co-transport of glucose with Na+ into cytoplasm is facilitated     allows for the diffusion of K+ inside of cell so that co-transport with glucose is facilitated

Polyethylene glycol (PEG) is a solute that is consumed in order to "clean out" the digestive tract in preparation for a colonoscopy. PEG cannot enter intestinal cells as there is no transport mechanism for it. How would this affect the absorption of water into the small intestine? (assume that it is taken at the correct dose and you are not actually reversing the concentration gradient across the intestinal cells.) Explain your answer in terms of concentration gradients.

Which is not a type of endocytotic vesicular transport? a. engulfment of microorganismsb. nutrient absorption of intestinal cellsc. neurotransmitter released. insulin uptakee. none of the above

The stomach has two types of exocrine cells, chief cell which secrete an inactive form of the protein degesting enzymes pepsinogen, and parietal cells , which secrete hydrochloric acid that activates pepsinogen.Both cell types have an abundance of mitochondria ATP production.The chief cells need energy to synthesise pepsinogen and parietal cells need energy to transport hydrogen ions and chloride ions from the blood into the stomach lumen.Only one of this cell types has an extensive roung endoplasmic and abandant Golgi stacks. Would this be the chief cells or parietal cells?why?

Sodium/glucose cotransporters on intestinal cells move glucose from the intestinal lumen (low glucose concentration) to inside the cell (high glucose concentration).  Which of the following would increase the rate of glucose transport into the cell? a.  Increase the intracellular glucose concentration. b. Decrease the extracellular glucose concentration. c. Decrease the extracellular Na+ concentration. d. Increase the extracellular Na+ concentration.

what type of glucose transport protein is found in pancreatic beta cells? SGLUT-1 GLUT-2 GLUT-3 GLUT-4 GLUT-5