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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Which group of cells would be least likely to contain cells in the S phase of the cell cycle?

Neurons in the adult human brain

Gastrointestinal tract lining cells

Hematopoietic stem cells in the bone marrow

Epithelial cells in the skin

Previous problemNext problem

Verified step by step guidance

Understand the S phase of the cell cycle: The S phase is the part of the cell cycle where DNA replication occurs, preparing the cell for division. Cells actively dividing or preparing to divide will be in the S phase.

Consider the characteristics of neurons in the adult human brain: Neurons are highly specialized cells that typically do not divide after differentiation. Most adult neurons are in a permanent state of rest known as G0 phase, making them unlikely to be in the S phase.

Examine gastrointestinal tract lining cells: These cells are constantly being replaced due to wear and tear from digestion, meaning they frequently enter the cell cycle, including the S phase, to replicate and replace old cells.

Evaluate hematopoietic stem cells in the bone marrow: These stem cells are responsible for producing new blood cells, which requires regular cell division. Therefore, they are often in the S phase as they prepare for division.

Assess epithelial cells in the skin: Similar to gastrointestinal tract lining cells, skin epithelial cells are regularly replaced due to external damage and wear, necessitating frequent cell division and presence in the S phase.