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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

4. Tissues & Histology

Introduction to Tissues & Histology

Anatomy & Physiology

4. Tissues & Histology

Introduction to Tissues & Histology

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Multiple Choice

Which of the following is true about histone modifications?

Histone modifications are permanent and cannot be reversed.

Histone modifications only occur in prokaryotic cells.

Histone modifications can influence gene expression by altering chromatin structure.

Histone modifications can directly alter the DNA sequence.

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Verified step by step guidance

Understand that histone modifications are chemical changes to the histone proteins around which DNA is wrapped, affecting how tightly or loosely DNA is packaged.

Recognize that these modifications can influence gene expression by altering chromatin structure, making genes more or less accessible for transcription.

Note that histone modifications are not permanent; they are dynamic and can be reversed, allowing for regulation of gene expression in response to cellular signals.

Acknowledge that histone modifications occur in eukaryotic cells, not prokaryotic cells, as prokaryotes do not have histones.

Clarify that histone modifications do not directly alter the DNA sequence; they affect gene expression by changing the chromatin structure, not the genetic code itself.