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

16. The Endocrine System

Intracellular Receptors and Direct Gene Action

Anatomy & Physiology

16. The Endocrine System

Intracellular Receptors and Direct Gene Action

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Multiple Choice

True or False: if false, choose the answer that best corrects the statement.

Steroid hormones are the only hormones that interact with the DNA via a receptor-hormone complex.

True.

False; all hormones can interact with DNA via a receptor-hormone complex; it depends on what type of receptor is used at the target cell.

False; thyroid hormone is an amino-acid based hormone that interacts with DNA via a receptor hormone complex.

False; most peptide hormones interact with the DNA via a receptor complex, while most steroid hormones use second messenger systems.

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Verified step by step guidance

Understand the nature of steroid hormones: Steroid hormones are lipid-soluble and can pass through the cell membrane to interact directly with intracellular receptors.

Recognize how steroid hormones function: Once inside the cell, steroid hormones bind to specific intracellular receptors, forming a receptor-hormone complex that can directly interact with DNA to regulate gene expression.

Consider other hormone types: Not all hormones function like steroid hormones. For example, peptide hormones typically bind to cell surface receptors and use second messenger systems to exert their effects.

Identify exceptions: Thyroid hormones, although not steroids, are an exception as they are amino-acid based but can enter cells and interact with DNA via a receptor-hormone complex.

Evaluate the statement: The statement is false because thyroid hormones, which are not steroid hormones, also interact with DNA via a receptor-hormone complex. Therefore, the correct answer is: False; thyroid hormone is an amino-acid based hormone that interacts with DNA via a receptor hormone complex.