Human Physiology: An Integrated Approach (8th Edition)
8th Edition
ISBN: 9780134605197
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 22.5, Problem 12CC
Summary Introduction
To explain: The reason why plasma cholesterol needs the help of a membrane transporter to enter cells while it is soluble in lipids.
Introduction: Cholesterol is an important component of cell membranes and used to make important vitamins and hormones. We get cholesterol from various food products like eggs, milk, meat, and so on. It is also produced in our body by the liver.
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Chapter 22 Solutions
Human Physiology: An Integrated Approach (8th Edition)
Ch. 22.1 - Explain the roles of the satiety and feeding...Ch. 22.1 - Name the four layers of the GI tract wall,...Ch. 22.2 - Prob. 3CCCh. 22.2 - Prob. 4CCCh. 22.2 - Prob. 5CCCh. 22.2 - Prob. 6CCCh. 22.4 - Prob. 7CCCh. 22.4 - Prob. 8CCCh. 22.4 - Use your understanding of digestive physiology to...Ch. 22.5 - Prob. 10CC
Ch. 22.5 - Prob. 11CCCh. 22.5 - Prob. 12CCCh. 22.6 - What are the primary target tissues for insulin?Ch. 22.6 - Why are glucose metabolism and glucose transport...Ch. 22.6 - What is the advantage to the body of inhibiting...Ch. 22.6 - Prob. 16CCCh. 22.6 - Prob. 17CCCh. 22.6 - Prob. 18CCCh. 22.6 - Prob. 19CCCh. 22.6 - Prob. 20CCCh. 22.7 - Prob. 21CCCh. 22.7 - Prob. 22CCCh. 22.7 - Prob. 23CCCh. 22.7 - Prob. 24CCCh. 22 - Define metabolic, anabolic, and catabolic...Ch. 22 - Prob. 2RQCh. 22 - Prob. 3RQCh. 22 - Prob. 4RQCh. 22 - Define basal metabolic rate (BMR). Under what...Ch. 22 - Prob. 6RQCh. 22 - Prob. 7RQCh. 22 - What is a nutrient pool? What are the three...Ch. 22 - Prob. 9RQCh. 22 - Prob. 10RQCh. 22 - Prob. 11RQCh. 22 - Name the two hormones that regulate glucose...Ch. 22 - Which noncarbohydrate molecules can be made into...Ch. 22 - Under what circumstances are ketone bodies formed?...Ch. 22 - Name two stimuli that increase insulin secretion,...Ch. 22 - Prob. 16RQCh. 22 - What factors release glucagon? What organ is the...Ch. 22 - Prob. 18RQCh. 22 - Prob. 19RQCh. 22 - Prob. 20RQCh. 22 - Prob. 21RQCh. 22 - Prob. 22RQCh. 22 - Prob. 23RQCh. 22 - Prob. 24RQCh. 22 - Explain the current theory of the control of food...Ch. 22 - Prob. 26RQCh. 22 - Scott is a bodybuilder who consumes large amounts...Ch. 22 - Prob. 28RQCh. 22 - Prob. 29RQCh. 22 - One of the debates in fluid therapy for diabetic...Ch. 22 - Prob. 31RQCh. 22 - Prob. 32RQ
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- A phospholipid bilayer with equal amounts of saturated and unsaturated fatty acids displays a specific permeability to glucose. What effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose?arrow_forwardwhy is unsaturated fatty acid used to maintain membrane fluidity and flexibility?arrow_forwardGlucose (C6H12O6) exhibits which of the following membrane transport movements? it is able to cross the membrane by facilitated diffusion, because it is small, polar, and organic it is not able to cross the membrane by passive transport, because it is big, polar, and inorganic it is able cross the membrane by simple diffusion, because it is small, nonpolar, and inorganic it is not able to cross the membrane by active transport, because it is big, polar, and inorganic it is able to cross the membrane by active transport, because it is big, nonpolar, and organic 10. A red blood cell that displays a biconcave disc shape must be in which of the following solutions? hypertonic solution distilled water isotonic solution ocean water hypotonic solutionarrow_forward
- The intracellular salt content of a red blood cell is about 150 mM. The cell is put in a 500 mM salt beaker. (a) Describe what will happen to the cell in terms of osmosis if the cell membrane is permeable to water but not to ions. (b) Which direction would solutes diff use if the membrane was permeable to ions: into or out of the cell?arrow_forwardGlucose 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]arrow_forwardThe transport of glucose into most cells occurs by facilitated diffusion. Because diffusion occurs from a higher to a lower concentration, glucose cannot accumulate within these cells at a higher concentration than exists outside the cell. Once glucose enters a cell, it is rapidly converted to other molecules, such as glucose phosphate or glycogen. What effect does this conversion have on the cell' ability to transport glucose?arrow_forward
- Why is ketosis frequently accompanied by acidosis?arrow_forwardWhy is ATP required for active transport?arrow_forwardFatty acids must associate with lipid chaperones in order to move within the cell. Why are these chaperones needed, and what is the name given to a group of proteins that are responsible for this intracellular trafficking of fatty acids? What is the key distinguishing feature of these proteins that allows fatty acids to move within the cell?arrow_forward
- 1)What is the second type of lipid that plays a major role in the plasma membrane? This lipid does not have polar and nonpolar regions (its not amphiphilic) but plays a critical role in membrane permeability. A)Triglycerdies B) Steriod hormones c) cholesterol 2) In _______________, a single substrate/solute move from a high concentration area to a lower concentration are without the aid of any additional molecules. A) Diffusion B)Facilitated diffusion C) Cotransport 3)Channel proteins require a confirmational change in order to properly function. A) Hydrophilic B) ionic C) Polararrow_forwardWhat does the term intracellular fluid refer to?arrow_forwardCarbohydrates are attached to plasma membrane proteins in the ER (see Figure 7.9). On which side of the vesicle membrane are the carbohydrates during transport to the cell surface?arrow_forward
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