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

3. Energy & Cell Processes

Introduction to the Cell Cycle

Anatomy & Physiology

3. Energy & Cell Processes

Introduction to the Cell Cycle

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Multiple Choice

At the beginning of spermatogenesis, cells are called __________ and contain 46 chromosomes.

secondary spermatocytes

spermatids

spermatogonia

primary spermatocytes

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Verified step by step guidance

Understand the process of spermatogenesis: Spermatogenesis is the process by which sperm cells are produced in the testes. It begins with diploid cells that undergo several stages of division and differentiation.

Identify the starting cell type: The initial cells in spermatogenesis are called spermatogonia. These are diploid cells, meaning they contain 46 chromosomes (23 pairs).

Clarify the role of spermatogonia: Spermatogonia serve as the stem cells for sperm production. They divide by mitosis to produce more spermatogonia or differentiate into primary spermatocytes.

Differentiate between primary spermatocytes and other cell types: Primary spermatocytes are formed from spermatogonia and undergo meiosis I to produce secondary spermatocytes, which then proceed to meiosis II to form spermatids.

Review the chromosome count: Spermatogonia contain 46 chromosomes, while secondary spermatocytes and spermatids have 23 chromosomes due to the reduction division during meiosis.