3 1 point Epithelial cells that line the digestive system are responsible for absorption and secretion of materials across the cell's plasma membrane. If a loss of function mutation occurred in the claudin gene that make up tight junctions, which of the following would occur? Mark all that apply. Lumen of the Small Intestine Blood vessel N(a^(+))/(K^(+))Pump Outside cells: [Low Glucose] [Low Amino Acid] [High Na^(+) 1point Epithelial cells that line the digestive system are responsible for absorption and secretion of materials across the cell's plasma membrane. If a loss of function mutatior occurred in the claudin gene that make up tight junctions, which of the following would occur? Mark all that apply. Lumen of the Small Intestine Outside cells: [Low Glucose] [Low Amino Acid] [High Na] Microtubule Inside cells: [High Glucose] [High Amino Acid] [Low Na*] Golgi ER Nucleus Nucleus Nucleus Blood vessel Na+/K* Pump Na*/Glucose Co-Transporter Glucose Carrier Na*/AA Co-Transporter Amino Acid Carrier
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Step 1: A loss of function mutation in the claudin gene that make up tight junctions would lead to a disruption in the integrity of the tight junctions between epithelial cells in the digestive system. Show more…
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Glucose and sodium move from the lumen of the small intestine into the blood via transport proteins in the epithelial cells lining the small intestines (Figure 1). Based on Figure 1, describe the direct source of energy used to move glucose into the epithelial cell from the intestinal lumen. Explain how this system maximizes glucose absorption from the intestinal lumen into the epithelial cells and from the epithelial cells into the blood. Introduction to Natural Selection (notes based on video from AP Biology Youtube (March 25). Glucose and sodium move from the lumen of the small intestine into the blood via transport proteins in the epithelial cells lining the small intestines (Figure 1). Based on Figure 1, describe the direct source of energy used to move glucose into the epithelial cell from the intestinal lumen. Explain how this system maximizes glucose absorption from the intestinal lumen into the epithelial cells and from the epithelial cells into the blood.
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The plasma membrane performs all of the following functions except regulating the flow of materials into and out of the cell, facilitating protein synthesis, providing a barrier, and facilitating communication with other cells.
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1) Which of the following cells in a healthy adult human show the highest turnover? A. Neurons of the hippocampus B. Epithelial cells of the urinary tract C. Hepatocytes of the liver D. Epithelial cells of the small intestine E. Neutrophils of the blood 2. Indicate true (T) and false (F) statements below regarding the pattern of cell proliferation in the epithelium that forms the lining of the small intestine. Your answer would be a four-letter string composed of letters T and F only, e.g. TTTT. - New epithelial cells are constantly born throughout the epithelial sheet, mostly at the villi. ( ) - Every type of intestinal epithelial cell is eventually discarded into the gut lumen where they die. ( ) - There is a net movement of cells from the bottom of the crypts up toward the tip of the villi. ( ) -The majority of intestinal epithelial cells have packed microvilli on their apical surfaces. ( )
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