Considering the following membrane transport processes: 1.Sodium pump 2. Stomach HCl transport 3. Glucose uptake from the intestine to the bloodstream For each of the following, indicate all of the above processes that have the property (give numbers). A. has a facilitated diffusion component. B. Would be inhibited if ATP were absent C. Uses 20-40% of cellular energy D.Sets up a pH gradient E. Sets up an electrical gradient

Considering the following membrane transport processes: 1.Sodium pump 2. Stomach HCl transport 3. Glucose uptake from the intestine to the bloodstream For each of the following, indicate all of the above processes that have the property (give numbers). A. has a facilitated diffusion component. B. Would be inhibited if ATP were absent C. Uses 20-40% of cellular energy D.Sets up a pH gradient E. Sets up an electrical gradient

Human Physiology: From Cells to Systems (MindTap Course List)

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter7: The Peripheral Nervous System: Efferent Division

Section: Chapter Questions

Problem 1SQE

See similar textbooks

Similar questions

Imagine a hypothetical cell with a higher concentration of glucose inside the cell thanoutside. Answer the following questions about this cell, assuming all transport acrossthe membrane is passive, not active.a. Can the glucose simply diffuse across the cell membrane? Why or why not?b. If there are glucose transport proteins in the cell membrane, which way wouldglucose flow- into or out of the cell? Explain your answer.c. If the concentration of glucose was equal inside and outside of the cell, do you thinkthere would be a net flow of glucose across the cell membrane in one direction orthe other? Explain your answer.
Among the membrane transporters, the channels require energy and therefore are involved in active transport. * D. Disagree, because channels are not proteins and therefore are not involved in active tranport. A. Agree, because channels are associated with H+-ATPase. B. Disagree, because the pumps are the ones involved in active transport. C. Agree, because channels are proteins involved in active transport.
Below are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a.The primary active transport uses external chemical energy. b.The sodium-potassium pump which is an example of primary active transport is considered as the most important pump. c. In primary active transport, the energy is derived secondarily from energy that has been stored in the form of ionic concentration differences between the two sides of a membrane.
Below are three statements - two of which are truths and one is a lie. Which of the following statements is a lie? Select one: a. Both primary and secondary transport moves solutes against their concentration gradients. b. The primary active transport prepares the conditions of the membrane gradient by making the extracellular membrane slightly more negative than the intracellular membrane. c. The primary active transport uses ATP while secondary active transport helps replenish ATP.
Drawn on the picture is a skeletal muscle cell. It is surrounded by extracellular fluid high in oxygen, which has come from blood in a nearby capillary. The concentrations (measured as pressure) of oxygen (in units of millimeters of mercury) in the cytoplasm and extracellular fluid (ECF) are given. A. Is ATP required for this transport process to occur? Explain why or why not. B. Consider only the oxygen levels present in the cytoplasm and ECF as shown in the drawing above (no new oxygen is entering the region; no oxygen is leaving). What will the concentration of oxygen in the cytoplasm be when equilibrium is reached?
The membrane transport protein Na+-K+ ATPase carries both Na+ and K+ ions across the plasma membrane. Typically the concentration of K+ inside cells is about 30 times higher inside the cell than outside. The concentration of Na+ is about 20 times less inside the cell than outside. Based on this information, which statement below is false? A. The proper functioning of Na+-K+ ATPase could serve as an energy source for secondary active transport proteins. B. It is a symport. C. Transport of Na+ and K+ must be coupled to an exergonic reaction. D. Na+-K+ ATPase likely undergoes conformational changes during transport.
Which of the following Ca++ ion channels removes calcium ions from the cytoplasm of the cell? 1. voltage-gated Ca++ channels 2. Na+/Ca++ active transport pumps 3. Ca++ uniporter 4. Na+/Ca++ exchanger Group of answer choices (A) 1 and 2 (B) 1, 2, and 3 (C) 2 and 4 (D) 2, 3, and 4 (E) 3 and 4
The movement of molecules in and out of a cell is essential to its function. The cell membrane regulates this movement though processes such as diffusion, osmosis, active transport, etc. These activities on the next couple pages are designed to assess your understanding of these processes. Scenario #3 Semi-permeable membrane Охудen Carbon Dioxide Lungs I Blood stream After studying the image above, select the statement(s) that would explain what is likely to happen. Choose ALL that apply. O The carbon dioxide molecules will move into the lungs until equalibrium is reached. O All the carbon dioxide molecules will move into the lungs to be exhaled. O All the oxygen molecules will move from the lungs into the blood stream. O The semipermeable membrane will prevent the movement of either molecule. O The oxygen molecules will move into the blood stream until equalibrium is reached.
Can you solve both parts to this question please A. In the gastric proton pump, H+ is transported into the stomach. What molecule is cotransported and where does it go? B. The K+ concentration is higher in the mucosal cells lining the stomach than the K+ concentration in the stomach because of the sodium pump. Why would a cotransport protein that carried both K+and H+ from the mucosal cell into the stomach by secondary active transport create a problem?
An important aspect of cell metabolism is the movement of molecules across the cell membrane. Molecules generally move down an electrochemical gradient however in many instances the opposite is required. Explain how transporters can move molecules against their electrochemical gradient – discuss the mechanism of action of sarcoplasmic reticulum Ca2+ pumps and sodium-glucose co-transporters in your answer.
An adipocyteis an animal cell that is specialized for the storage of triacylglycerol molecules. A hepatocyteis far more metabolically active, spending nearly all its time synthesizing proteins and other materials to be used elsewhere in the body. Which cell would have more Golgi apparatus? Explain.
(b) The GLUT system is highly selective for glucose. It also speeds up the rate of glucose transport across the membrane by as much as 100-fold when compared to the passive diffusion of glucose across a bilayer in the absence of any transport system. While impressive, this rate of transport is much slower than purely diffusion limited rate of movement (ie. the fastest a molecule can move by diffusion). Given this fact, on the blank plot below draw the expected relationship between the rate of GLUT-mediated transport and increasing [glucose]? Use the space below the graph to explain your answer. fast Transport Rate slow low [glucose] high (c) Next, use a dashed line on the same plot above to draw the shape of the curve when the amount of GLUT transporters in the membrane is cut in half. Briefly explain your answer in the space provided below the graph.