a) Which of the two molecules that are the same size will passively diffuse across a cell membrane quicker? Why? [2 A] b) Which type of transport method would glucose use? Why? [2 A] Figure 1: Relative Sizes of Molecules Diffusing Across a Cell Membrane Substance Tested water oxygen glycerol glucose alcohol carbon dioxide Graph 0 50 100 Relative Size of Molecules 150 200

a) Which of the two molecules that are the same size will passively diffuse across a cell membrane quicker? Why? [2 A] b) Which type of transport method would glucose use? Why? [2 A] Figure 1: Relative Sizes of Molecules Diffusing Across a Cell Membrane Substance Tested water oxygen glycerol glucose alcohol carbon dioxide Graph 0 50 100 Relative Size of Molecules 150 200

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

9th Edition

ISBN:9781285866932

Author:Lauralee Sherwood

Publisher:Lauralee Sherwood

Chapter3: The Plasma Membrane And Membrane Potential

Section: Chapter Questions

Problem 4UC

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Similar questions

(a) Describe permeability of a phospholipid bilayer for the following molecules. Use terms: non-permeable, high permeability, medium permeability. N2, O2, Na+, glucose, sucrose (disaccharide), glycogen, H2O, KCl, K+, Mg2+, glycine and protein (b) Discuss the role of carbonic anhydrase in CO2 transport. (c) Discuss the cause of ‘cold denaturation’ of proteins.
For primary and secondary active transport, describe the mechanism by which movement occurs, the energy requirements, the sources of energy, and the types of molecules moved?
Glucose transport across cell membranes varies depending upon blood glucose levels. When glucose levels are high, glucose transport is accomplished via membrane transporters. When glucose concentrations are low, the transport of glucose across the membrane is dependent upon the sodium ion concentration. What types of transport is observed for glucose? A)simple diffusion at high [glucose], secondary active transport at low [glucose] B)facilitated diffusion at high [glucose], secondary active transport at low [glucose] C)simple diffusion at high [glucose], primary active transport at low [glucose] D)facilitated diffusion at high [glucose], primary active transport at low [glucose]
. Please describe the transportation of glucose after a meal when glucose is plentifuloutside cells? How is the transport protein that would transport glucose called? Whatwould be the direction of transportation? Would it be active or passive transport? Whatwould be driving force for the glucose transport: chemical gradient or electrochemicalgradient?
Explain how salt concentrations contribute to the cell membrane intergrity in cells? What are the three different scenarios that could occur and why?
Glucose cannot enter easily inside the cell and require insulin to do so.What type of transport/movement does glucose exhibit?
Why is ATP required for active transport?
Which of the following accurately represents the general ionic concentrations we tend to observe in the extracellular space, relative to the cytosol? High Na, Ca. Low K, Cl. High Na, Cl. Low K, Ca. High Na, Ca, Cl. Low K. Low Na, Ca, Cl. High K.
What type of transport is illustrated by the protein that simultaneously pump H+ and surcose across a membrane?
For each type of membrane transport, know the following:– Is a transporter protein required? If so, what type?– Is there an energy requirement, and if so, what is the energy source?– What is the relative rate of solute transport based on molecule type? On concentration gradient?– What are examples of the types of solutes transported by carriers and channels?
List the means of unassisted membrane transport.
Using the answer code on the right, indicate which membrane component is responsible for the function in question: 1. channel formation____________________________________ (a) lipid bilayer 2. barrier to passage of water- __________________ (b) proteins soluble substances ____________________________________ (c) carbohydrates 3. receptor sites 4. membrane fluidity 5. recognition of self 6. membrane-bound enzymes 7. structural boundary 8. carriers