Biology
12th Edition
ISBN: 9780134813448
Author: Audesirk, Teresa, Gerald, Byers, Bruce E.
Publisher: Pearson,
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Chapter 35, Problem 2AC
Summary Introduction
To determine:
The initial hopes of scientists when leptin was discovered after they found that excess leptin in blood does not reduce hunger or food intake.
Introduction:
Leptin is a peptide secreted by fat cells, and helps to regulate fat storage in mammals. Leptin secretions increase when fat storage “increases” and “decreases” when fat storage falls down to an optimum level.
Summary Introduction
To suggest:
An evolutionary explanation for leptin’s role in fat regulation.
Introduction:
Leptin is a hormone of energy expenditure; and is formed by adipose cells that help to regulate energy balance by inhibiting hunger.
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Chapter 35 Solutions
Biology
Ch. 35.1 - You have probably seen articles warning of the...Ch. 35.1 - Prob. 1TCCh. 35.1 - Prob. 1CSCCh. 35.1 - Prob. 1CYLCh. 35.1 - explain how food energy is measured and how energy...Ch. 35.1 - Prob. 3CYLCh. 35.2 - Prob. 1CYLCh. 35.2 - compare the various ways that invertebrates digest...Ch. 35.2 - explain how vertebrate digestive systems are...Ch. 35.3 - Prob. 1TC
Ch. 35.3 - Stomach acid can be very destructive to the...Ch. 35.3 - Prob. 2TCCh. 35.3 - Prob. 3TCCh. 35.3 - Prob. 1CYLCh. 35.3 - explain how the small intestine absorbs nutrients,...Ch. 35.3 - describe feces and how they are produced and...Ch. 35.3 - Prob. 4CYLCh. 35.3 - The causes of eating disorders are complex and...Ch. 35 - Which of the following is False? a. Carbohydrates...Ch. 35 - Prob. 2MCCh. 35 - Prob. 3MCCh. 35 - Prob. 4MCCh. 35 - Prob. 5MCCh. 35 - Prob. 1FIBCh. 35 - Sponges rely exclusively on __________ digestion....Ch. 35 - Prob. 3FIBCh. 35 - The five major processes carried out by the...Ch. 35 - In humans, a cavity called the __________ is...Ch. 35 - Fats are dispersed by a secretion called...Ch. 35 - Prob. 7FIBCh. 35 - Prob. 1RQCh. 35 - Prob. 2RQCh. 35 - Vertebrates can be grouped into three categories...Ch. 35 - Prob. 4RQCh. 35 - Prob. 5RQCh. 35 - Prob. 6RQCh. 35 - Prob. 7RQCh. 35 - Prob. 8RQCh. 35 - Name four structural or functional adaptations of...Ch. 35 - Prob. 10RQCh. 35 - Prob. 11RQCh. 35 - Prob. 12RQCh. 35 - Prob. 1ACCh. 35 - Prob. 2ACCh. 35 - Prob. 3AC
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- An increase in the amount of stored lipids leads to changes in the expression of many hormones. One such hormone is tumor necrosis factor α (TNF-α). A change in expression of this hormone can lead to a change in the free fatty acid level, which, in turn, decreases insulin sensitivity. Place the steps of this process in order.arrow_forwardThe pentose phosphate pathway is quite active in adipose tissue. Why? Explain how this pathway complements lipogenesis with the use of an example (such as a person eating chocolate).arrow_forwardDuring periods of stress or fasting, blood glucose levels fall. In response, fatty acids are released from adipocytes into the blood. Explain how such a blood glucose level decrease results in fatty acid release.arrow_forward
- The body doesn’t have a reserve of proteins or amino acids for energy production. Which class of protein may be used initially during fasting to maintain glucose and energy levels? What is the difference between a glucogenic and ketogenic amino acid and why are both important during fasting?arrow_forwardWhich of the following would not be considered a reason for the decline in fat oxidation with increasing exercise intensity? Increased lactic acid production Reduced lactic acid production Reduced appearance of FA in the bloodstream Reduced transport of FA into the mitochondriaarrow_forwardExplain how appetite is controlled by the brain. What is the benefit ofhaving a hormone released from adipose cells in proportion to total fatmass?arrow_forward
- Are fatty foods always rich in calories? and Why?arrow_forwardObesity research has shown that about one in 1,000 people has a genetic disorder called leptin resistance. This occurs due to a mutation in the gene that codes for:arrow_forwardExplain the phrase “diet-induced thermogenesis” and relate it to the problem of obesity in some people. What other factors may contribute to human obesity?arrow_forward
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