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Review Concept 9.6. In additional to carbohydrates, catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration. True O False

Review Concept 9.6. In additional to carbohydrates, catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration. True O False

Human Anatomy & Physiology (11th Edition)
Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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Concept 9.6: Glycolysls and the cltric acld cycle connect to many other metabollc pathways • Glycolysis and the citric acid cycle are major intersections to various catabolic and anabolic pathways. • The Versatility of Catabolism (Figure 9.19) • Catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration • Glycolysis accepts a wide range of carbohydrates including starch, glycogen, and several disaccharides. • Proteins that are used for fuel must be digested to amino acids and their amino groups must be removed. • Fats are digested to glycerol (used to produce compounds needed for glycolysis) and fatty acids. Fatty acids are broken down by FADH2. An oxidized gram of fat produces more than twice as much ATP as an oxidized gram of carbohydrate. • Biosynthesis (Anabolic Pathways) • The body uses small molecules from food to build other their own molecules such as proteins. These small molecules may come directly from food, from glycolysis, or from the citric acid cycle. • Regulation of Cellular Respiration via Feedback Mechanisms • Feedback inhibition is the most common mechanism for metabolic control (Figure 9.20). • If ATP concentration begins to drop, respiration speeds up; when there is plenty of ATP, respiration slows down. • Control of catabolism is based mainly on regulating the activity of enzymes at strategic points in the catabolic pathway. and yield acetyl COÁ, NÁDH, and
Transcribed Image Text:Concept 9.6: Glycolysls and the cltric acld cycle connect to many other metabollc pathways • Glycolysis and the citric acid cycle are major intersections to various catabolic and anabolic pathways. • The Versatility of Catabolism (Figure 9.19) • Catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration • Glycolysis accepts a wide range of carbohydrates including starch, glycogen, and several disaccharides. • Proteins that are used for fuel must be digested to amino acids and their amino groups must be removed. • Fats are digested to glycerol (used to produce compounds needed for glycolysis) and fatty acids. Fatty acids are broken down by FADH2. An oxidized gram of fat produces more than twice as much ATP as an oxidized gram of carbohydrate. • Biosynthesis (Anabolic Pathways) • The body uses small molecules from food to build other their own molecules such as proteins. These small molecules may come directly from food, from glycolysis, or from the citric acid cycle. • Regulation of Cellular Respiration via Feedback Mechanisms • Feedback inhibition is the most common mechanism for metabolic control (Figure 9.20). • If ATP concentration begins to drop, respiration speeds up; when there is plenty of ATP, respiration slows down. • Control of catabolism is based mainly on regulating the activity of enzymes at strategic points in the catabolic pathway. and yield acetyl COÁ, NÁDH, and
Question 8 Review Concept 9.6. In additional to carbohydrates, catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration. O True O False
Transcribed Image Text:Question 8 Review Concept 9.6. In additional to carbohydrates, catabolic pathways funnel electrons from many kinds of organic molecules into cellular respiration. O True O False
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