Human Physiology: An Integrated Approach (7th Edition)
7th Edition
ISBN: 9780321981226
Author: Dee Unglaub Silverthorn
Publisher: PEARSON
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Chapter 22, 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 (7th Edition)
Ch. 22 - Explain the roles of the satiety and feeding...Ch. 22 - Name the four layers of the GI tract wall,...Ch. 22 - Prob. 3CCCh. 22 - Prob. 4CCCh. 22 - Prob. 5CCCh. 22 - Prob. 6CCCh. 22 - Prob. 7CCCh. 22 - Prob. 8CCCh. 22 - Use your understanding of digestive physiology to...Ch. 22 - Prob. 10CC
Ch. 22 - Prob. 11CCCh. 22 - Prob. 12CCCh. 22 - What are the primary target tissues for insulin?Ch. 22 - Why are glucose metabolism and glucose transport...Ch. 22 - What is the advantage to the body of inhibiting...Ch. 22 - Prob. 16CCCh. 22 - Prob. 17CCCh. 22 - Prob. 18CCCh. 22 - Prob. 19CCCh. 22 - Prob. 20CCCh. 22 - Prob. 21CCCh. 22 - Prob. 22CCCh. 22 - Prob. 23CCCh. 22 - 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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- why is unsaturated fatty acid used to maintain membrane fluidity and flexibility?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 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_forward
- Why is ketosis frequently accompanied by acidosis?arrow_forward1)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_forwardWhy is ATP required for active transport?arrow_forward
- What does the term intracellular fluid refer to?arrow_forwardThe three fundamental classes of proteins involved in transport across membranes are: i) channelsii) pumpsiii) exchangers For each class, describe its essential features, explain how transport is accomplished and name at least one representative example.arrow_forwardRecently, consumption of trans fatty acids has been linked to high blood cholesterol levels and increased risk of heart disease. The food industry has responded by decreasing use of "trans fats." Consider the following questions: (a) How do the structures and transition temperatures of trans, cis, and saturated fatty acids differ, and what are the effects on membrane fluidity? (b) Are trans fatty acids abundant in nature? (c) The major source of trans fats is hydrogenated oils. (The trans fats are produced by a side reaction during the hydrogenation process.) Why has the food industry used synthetically produced hydrogenated oils?arrow_forward
- If the phosphoglycerolipids constituting the framework of the plasma membrane, these are what give it its functions. There are two main classes of membrane proteins: intramembrane proteins and peripheral protections. What is the distinction between intramembrane and peripheral proteins.arrow_forwardWhat effect will increasing the proportion of unsaturated fatty acids in the bilayer have on the membrane's permeability to glucose? A) Permeability to glucose will increase. B) Permeability to glucose will decrese. C) Permeability to glucose will stay the same. D) Permeability will decrease initially then increase as the bilyaer fills with glucose.arrow_forwardHow are the ER and Golgi involved in membrane creation? (Think about lipid synthesis and distribution). What are the characteristics of Sphingolipid and cholesterol in the membrane? What does it do to the membrane? Explain raft formation.arrow_forward
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