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 Heart2h 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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Multiple Choice

Which of the following is a true statement comparing phospholipids and triacylglycerols (fats and oils)?

Both molecules contain a phosphate group.

Triacylglycerols may be saturated or unsaturated, but all phospholipids are saturated.

Phospholipids are the primary storage form for fats in our bodies.

In nature, phospholipids occur in fused rings (sterol form), whereas triacylglycerols maintain a straight-chain form.

Phospholipid molecules have a distinctly polar "head" and a distinctly nonpolar "tail," whereas triacylglycerols are predominantly nonpolar.

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Verified step by step guidance

Understand the structure of phospholipids: Phospholipids consist of a glycerol backbone, two fatty acid tails, and a phosphate group attached to a polar head group. This structure gives them a distinct polar 'head' and nonpolar 'tails'.

Understand the structure of triacylglycerols: Triacylglycerols, also known as triglycerides, are composed of a glycerol backbone and three fatty acid chains. They are predominantly nonpolar due to the long hydrocarbon chains of the fatty acids.

Compare the polarity: Phospholipids have a polar head due to the phosphate group, making them amphipathic (having both hydrophilic and hydrophobic parts). In contrast, triacylglycerols are mostly nonpolar because they lack a polar head group.

Evaluate the statement about storage: Triacylglycerols are the primary storage form of fats in the body, not phospholipids. Phospholipids primarily form cell membranes.

Assess the statement about saturation: Triacylglycerols can be either saturated or unsaturated, depending on the presence of double bonds in the fatty acid chains. Phospholipids can also have saturated or unsaturated fatty acid tails, contrary to the statement that all are saturated.