Textbook Question
A peanut butter and jelly sandwich contains carbohydrates, proteins, and fats. Describe what happens to the sandwich when you eat it. Discuss ingestion, digestion, absorption, and elimination.
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Ch. 21 Nutrition and Digestion
Taylor, Simon, Dickey, Hogan10th EditionCampbell Biology: Concepts & ConnectionsISBN: 9780136538783
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Table of contents
- Ch. 1 Biology: The Study of Scientific Life19
- Ch. 2 The Chemical Basis of Life17
- Ch. 3 The Molecules of Cells21
- Ch. 4 A Tour of the Cell20
- Ch. 5 The Working Cell17
- Ch. 6 How Cells Harvest Chemical Energy18
- Ch. 7 Photosynthesis: Using Light to Make Food15
- Ch. 8 The Cellular Basis of Reproduction and Inheritance22
- Ch. 9 Patterns of Inheritance17
- Ch. 10 Molecular Biology of the Gene13
- Ch. 11 How Genes Are Controlled13
- Ch. 12 DNA Technology and Genomics23
- Ch. 13 How Populations Evolve17
- Ch. 14 The Origin of Species19
- Ch. 15 Tracing Evolutionary History18
- Ch. 16 Microbial Life: Prokaryotes and Protists16
- Ch. 17 The Evolution of Plant and Fungal Diversity15
- Ch. 18 The Evolution of Invertebrate Diversity13
- Ch. 19 The Evolution of Vertebrate Diversity18
- Ch. 20 Unifying Concepts of Animal Structure and Function11
- Ch. 21 Nutrition and Digestion16
- Ch. 22 Gas Exchange16
- Ch. 23 Circulation17
- Ch. 24 The Immune System16
- Ch. 25 Control of Body Temperature and Water Balance20
- Ch. 26 Hormones and the Endocrine System10
- Ch. 27 Reproduction and Embryonic Development12
- Ch. 28 Nervous Systems10
- Ch. 29 The Senses12
- Ch. 30 How Animals Move19
- Ch. 31 Plant Structure, Growth, and Reproduction9
- Ch. 32 Plant Nutrition and Transport12
- Ch. 33 Control Systems in Plants15
- Ch. 34 The Biosphere: An Introduction to Earth's Diverse Environments15
- Ch. 35 Behavioral Adaptations to the Environment12
- Ch. 36 Population Ecology15
- Ch. 37 Communities and Ecosystems14
- Ch. 38 Conservation Biology14
Taylor, Simon, Dickey, Hogan10th EditionCampbell Biology: Concepts & ConnectionsISBN: 9780136538783Not the one you use?Change textbook
Chapter 21, Problem 9c
Use the Nutrition Facts label to the right to answer these questions: Each gram of fat supplies 9 Calories. Based on the grams of saturated fat and its % Daily Value, calculate the upper limit of saturated fat (in grams and Calories) that an individual on a 2,000-Calorie/day diet should consume.
Verified step by step guidance1
Identify the % Daily Value of saturated fat from the Nutrition Facts label, which is 5%.
Understand that the % Daily Value is based on a 2,000-Calorie/day diet.
Calculate the upper limit of saturated fat in grams by using the % Daily Value. Since 5% corresponds to 1 gram, 100% would correspond to 20 grams (1 gram / 5% * 100%).
Each gram of fat supplies 9 Calories. Therefore, multiply the upper limit of saturated fat in grams by 9 to find the upper limit in Calories.
Summarize the upper limit of saturated fat in both grams and Calories for an individual on a 2,000-Calorie/day diet.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Caloric Value of Fats
Fats are a macronutrient that provide a high energy yield, supplying 9 Calories per gram. This is significantly higher than carbohydrates and proteins, which provide 4 Calories per gram. Understanding the caloric value of fats is essential for calculating daily intake limits based on dietary guidelines.
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Nutrient Absorption
Daily Value (%DV)
The % Daily Value (%DV) on nutrition labels indicates how much a nutrient in a serving contributes to a daily diet, based on a 2,000-Calorie intake. It helps consumers understand the nutritional content of food in the context of their overall daily diet, guiding them in making healthier choices.
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Saturated Fat Recommendations
Health organizations recommend limiting saturated fat intake to less than 10% of total daily calories. For a 2,000-Calorie diet, this translates to a maximum of 22 grams of saturated fat per day. Understanding these recommendations is crucial for maintaining heart health and preventing chronic diseases.
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Related Practice
Textbook Question
Use the Nutrition Facts label to the right to answer these questions: What percentage of the recommended daily value of fat is found in a 1-cup serving?
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Textbook Question
Use the Nutrition Facts label to the right to answer these questions: Is this product a good source of vitamin D and calcium? Explain.
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Textbook Question
How might our craving for fatty foods, which is helping to fuel the obesity crisis, have evolved through natural selection?
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Textbook Question
One common piece of dieting advice is to replace energy-dense food with nutrient-dense food. What does this mean?
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Textbook Question
The media report numerous claims and counterclaims about the benefits and dangers of certain foods, dietary supplements, and diets. Have you modified your eating habits on the basis of nutritional information disseminated by the media? Why or why not? How should we evaluate whether such nutritional claims are valid?
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