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

Introduction to Chemical Bonding

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

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Multiple Choice

Which statement accurately describes the relationship between vitamin A and acne?

Vitamin A has no effect on acne as it only affects hair growth.

Vitamin A worsens acne by causing inflammation in the skin.

Vitamin A helps reduce acne by promoting skin cell turnover.

Vitamin A increases acne by stimulating oil production in the skin.

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Verified step by step guidance

Understand the role of vitamin A in the body, particularly its function in skin health. Vitamin A is known for its role in promoting skin cell turnover and maintaining healthy skin.

Consider the process of skin cell turnover. This is the process by which old skin cells are shed and new skin cells are generated. Vitamin A helps accelerate this process, which can prevent the clogging of pores that leads to acne.

Evaluate the effects of vitamin A on oil production and inflammation. While vitamin A is not primarily known for increasing oil production or causing inflammation, it is more associated with reducing these factors by keeping pores clear.

Analyze the options given in the problem. The statement that vitamin A helps reduce acne by promoting skin cell turnover aligns with the known benefits of vitamin A in dermatology.

Conclude that the correct relationship between vitamin A and acne is its ability to help reduce acne by promoting skin cell turnover, which prevents pore clogging and reduces the likelihood of acne formation.