Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Lipids

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Lipids

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Problem 9

Textbook Question

A fat molecule consists of .a. carbohydrates and proteins;b. complex carbohydrates only;c. saturated oxygen atoms;d. a carbon skeleton and fatty acids

Verified step by step guidance

Step 1: Understand the composition of a fat molecule, which is also known as a triglyceride.

Step 2: Recall that a triglyceride is composed of a glycerol backbone and three fatty acid chains.

Step 3: Recognize that the glycerol backbone is a carbon skeleton, which is a chain of carbon atoms.

Step 4: Identify that the fatty acids are long chains of carbon and hydrogen atoms, which attach to the glycerol backbone.

Step 5: Conclude that the correct components of a fat molecule are a carbon skeleton and fatty acids.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Fat Molecule Structure

Fat molecules, also known as lipids, primarily consist of a carbon skeleton and fatty acids. The carbon skeleton forms the backbone of the molecule, while fatty acids are long hydrocarbon chains that can be saturated or unsaturated, influencing the fat's properties and functions in biological systems.

Saturated vs. Unsaturated Fatty Acids

Fatty acids can be classified as saturated or unsaturated based on their chemical structure. Saturated fatty acids contain no double bonds between carbon atoms, making them solid at room temperature, while unsaturated fatty acids have one or more double bonds, resulting in a liquid state. This distinction is crucial for understanding the health implications of different types of fats.

Role of Lipids in Biology

Lipids, including fats, play essential roles in biological systems, such as energy storage, cellular structure, and signaling. They are a key component of cell membranes, providing fluidity and integrity, and serve as a concentrated energy source, making them vital for metabolic processes.

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Which of the following terms is least like the others?a. monosaccharide;b. phospholipid;c. fat;d. steroid;e. lipid

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The main constituents of the plasma membrane are .a. carbohydrates and lipids;b. proteins and phospholipids;c. fats and carbohydrates;d. fatty acids and nucleic acids

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Unsaturated fatsa. have double bonds in their fatty acid chains.b. have fewer fatty acid molecules per fat molecule.c. are associated with greater health risks than are saturated fats.d. are more common in animals than in plants.

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Which of the following substances is a major component of the cell membrane of a fungus?a. celluloseb. chitinc. cholesterold. phospholipids

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Textbook Question

Another aspect of the Nurses' Health Study looked at the percentage of change in the risk of coronary heart disease associated with substituting one dietary component for another. These results estimated that replacement of 5% of energy from saturated fat in the diet with unsaturated fats would reduce the risk of heart disease by 42%, and that the replacement of 2% of energy from trans fat with unsaturated fats would reduce the risk by 53%. Explain what these numbers mean.

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Compare and contrast the structures of phospholipids and triglycerides.

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Textbook Question

Mark the following statements as true or false. If a statement is false, correct it to make a true statement.

Lipids contain oxygen and are therefore polar covalent compounds.

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Textbook Question

Considering that water is a main component of the juices in the stomach and intestines, explain why digestion of lipids is more complicated than digestion of carbohydrates and proteins.

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