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 3

Textbook Question

Which of the following is true of unsaturated fats?a. They are more common in animals than in plants.b. They have double bonds in their fatty acid chains.c. They generally solidify at room temperature.d. They contain more hydrogen than do saturated fats having the same number of carbon atoms.

Verified step by step guidance

Identify the characteristics of unsaturated fats, focusing on their chemical structure and physical properties.

Recall that unsaturated fats have one or more double bonds in their fatty acid chains, which affects their hydrogen content and physical state.

Consider the typical sources of unsaturated fats, noting that they are more commonly found in plants than in animals.

Understand that the presence of double bonds in unsaturated fats prevents them from packing tightly, usually making them liquid at room temperature.

Compare the hydrogen content of unsaturated fats to saturated fats, noting that unsaturated fats have fewer hydrogen atoms due to the presence of double bonds.

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Key Concepts

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

Unsaturated Fats

Unsaturated fats are types of fatty acids that contain one or more double bonds in their hydrocarbon chains. These double bonds create kinks in the structure, preventing the molecules from packing closely together, which typically results in a liquid state at room temperature. They are primarily found in plant oils, nuts, and fish.

Saturated vs. Unsaturated Fats

Saturated fats have no double bonds between carbon atoms, allowing them to be fully saturated with hydrogen atoms. This structure leads to a straight chain that can pack tightly, making them solid at room temperature. In contrast, unsaturated fats, with their double bonds, are usually liquid at room temperature and are considered healthier for heart health.

Physical Properties of Fats

The physical state of fats at room temperature is influenced by their saturation level. Unsaturated fats tend to remain liquid due to their molecular structure, while saturated fats are solid. This property is important in nutrition and cooking, as it affects the texture and health implications of dietary fats.