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

5. Integumentary System

Introduction to the Integumentary System

Anatomy & Physiology

5. Integumentary System

Introduction to the Integumentary System

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Multiple Choice

Which part of the hair structure is responsible for actively producing new hair cells?

Hair shaft

Arrector pili muscle

Sebaceous gland

Hair matrix

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Verified step by step guidance

Step 1: Understand the anatomy of the hair structure. Hair consists of three main parts: the hair shaft (the visible part above the skin), the hair root (embedded in the skin), and the hair follicle (the structure housing the root).

Step 2: Learn the function of the hair matrix. The hair matrix is located at the base of the hair follicle, within the bulb. It contains actively dividing cells responsible for producing new hair cells.

Step 3: Differentiate the roles of other structures mentioned in the problem. The hair shaft is the non-living, keratinized part of the hair. The arrector pili muscle is responsible for causing the hair to stand upright (goosebumps). The sebaceous gland produces sebum, an oily substance that lubricates the hair and skin.

Step 4: Recognize that the hair matrix is the only part of the hair structure actively involved in cell division and hair growth. The other structures play supportive roles but do not produce new hair cells.

Step 5: Conclude that the correct answer is the hair matrix, as it is the region responsible for actively producing new hair cells through mitosis.