Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 41.5, Problem 2CC
WHAT IF? → Suppose you were studying two groups of obese people with genetic abnormalities in the leptin pathway. In one group, the leptin levels are abnormally high; in the other group, they are abnormally low. How would each group's leptin levels change if they ate a low-calorie diet for an extended period? Explain.
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Chapter: Lipid Metabolism
Individuals with abnormally low levels of carnitine in their muscles suffer from muscular weakness during moderate exercise. In addition, their muscles have significantly increased levels of triacylglycerols.
(a) Explain these two effects.
(b) Can these individuals metabolize muscle glycogen aerobically?
Chapter 41 Solutions
Campbell Biology (11th Edition)
Ch. 41.1 - An animal requires 20 amino acids to make...Ch. 41.1 - Prob. 2CCCh. 41.1 - WHAT IF? If a zoo animal eating ample food shows...Ch. 41.2 - Prob. 1CCCh. 41.2 - In what sense are nutrients from a recently...Ch. 41.2 - Prob. 3CCCh. 41.3 - Explain why a proton pump inhibitor, such as the...Ch. 41.3 - Thinking about our nutritional needs and feeding...Ch. 41.3 - Prob. 3CCCh. 41.4 - Prob. 1CC
Ch. 41.4 - What features of a mammal's digestive system make...Ch. 41.4 - WHAT IF? "Lactose-intolerant" people have a...Ch. 41.5 - Explain how people can become obese even if their...Ch. 41.5 - WHAT IF? Suppose you were studying two groups of...Ch. 41.5 - Prob. 3CCCh. 41 - Prob. 41.1CRCh. 41 - Propose an artificial diet that would eliminate...Ch. 41 - Prob. 41.3CRCh. 41 - How does human anatomy indicate that our primate...Ch. 41 - Prob. 41.5CRCh. 41 - Fat digestion yields fatty acids and glycerol....Ch. 41 - The mammalian trachea and esophagus both connect...Ch. 41 - Which of the following organs is incorrectly...Ch. 41 - Prob. 4TYUCh. 41 - Prob. 5TYUCh. 41 - After surgical removal of the gallbladder, a...Ch. 41 - If you were to jog 1 km a few hours after lunch,...Ch. 41 - DRAW IT Create a flowchart to summarize the events...Ch. 41 - EVOLUTION CONNECTION Lizards and snakes cannot...Ch. 41 - SCIENTIFIC INQUIRY In human populations of...Ch. 41 - WRITE ABOUT A THEME: ORGANIZATION Hair is largely...Ch. 41 - SYNTHESIZE YOUR KNOWLEDGE Hummingbirds are well...
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- is this stement false? Intracellular concentrations in resting muscle are as follows: Fructose-6-phosphate (1.0 mM)Fructose-(1-6)-bisphosphate (10.0 mM)AMP (0.1 mM)ADP (0.5 mM)ATP (5.0 mM)Pi (10.0 mM)Under the above conditions the Phosphofructokinase reaction in muscle is more exergonic than under standard conditions.arrow_forward1. A person ate 200 g of carbohydrates and then did not eat anything for a day. What process of carbon metabolism was stimulated in the liver 14 hours after the last meal? For answer: a) write a diagram of the process that speeds up in the liver after 14 hours after cating; b) indicate the regulatory reactions and their enzymcs; c) describe the mechanism of signal transduction by a hormone that regulates this metabolic pathway.arrow_forwardChapter : Lipid Metabolism"It has been proposed that malonyl CoA may be one of the signals sent to the brain to decrease the appetite response. When mice are given a derivative of cerulenin (a fungal epoxide) named C75, their appetite is suppressed and they rapidly lose weight. Cerulenin and its derivatives have been shown to be potent inhibitors of fatty acid synthase (FAS). Suggest how C75 might act as a potential weight reduction drug"Thanks. Please write the answers clearly.arrow_forward
- Q1. Many of the components for lipid synthesis need to be "activated", which happens by a variety of mechanisms. For each of the following activation processes, state WHAT is added and WHAT ENZYME catalyzes the reaction. Acetyl-CoA activation for fatty acid synthesis: WHAT is added: ENZYME: Glycerol activation for Phosphatidic Acid (PA) synthesis: WHAT is added: ENZYME: Fatty acid activation for Diacylglycerol (DAG) synthesis: WHAT is added: ENZYME: DAG activation for Phosphatidylinositol (PI) synthesis: WHAT is added: ENZYME: Choline activation for Phosphatidylcholine (PC) synthesis WHAT is added: ENZYME:arrow_forwardQ20arrow_forwardPlease answer fastarrow_forward
- . Describe the mechanisms controlling the pancreatic secretion ofHCO3 and enzyme?arrow_forwardbg7arrow_forwardChapter : Lipid metabolism Triasilgliserol (TAG) is stored in adipose tissue in the form of lipoproteins that will circulate in the blood plasma. By the time TAG reaches the adipose network, it will be hydrolyzed. Explain: a. TAG hydrolysis reaction b. regulation of storage and use of lipids in the animal's bodyarrow_forward
- Fatty acids and triglycerides are an important source of nutrition and a dense form of stored energy. Digestion of fats yields more energy per gram than digestion of carbohydrates. In the first step of fatty acid digestion, the carboxylic acid of a fatty acid is activated to a fatty acyl-CoA. This activation step A) requires the input of energy from ATP. B) requires the input of energy from NADH. C) releases energy which is captured in the form of ATP. D) releases energy which is captured in the form of NADH.arrow_forwardList and explain 5 important biochemical factors that could determine whether a person is feeling full or hungry (explain in details how these factors function)arrow_forwardB) Read the situations below and indicate which of the four methods of enzyme regulation is occurring for each. a) The energy-carrying molecule ATP is made by the enzyme ATP synthase. Muscle cells use a lot of energy and also have higher amounts of the ATP synthase enzyme than many ouier cem types. General mechanism of enzyme regulation: /1 b) Prostaglandins are messenger molecules involved in the inflammatory response, as well as th perception of pain. They are synthesized from polyunsaturated fatty acid substrates by an enzyn called cyclo-oxygenase. "Ibuprofen" is the active ingredient in a variety of anti-inflammatory medications such as Motrin® and Advil®. It reduces pain and swelling by binding to a hydrophobic channel in the active site of cyclo-oxygenase, blocking the polyunsaturated fatty acids from binding to the enzyme, and therefore stopping production of prostaglandins. General mechanism of enzyme regulation: a) In point form, describe the steps by which ATP is produced…arrow_forward
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