Table of contents

1. Introduction to Anatomy & Physiology5h 42m
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 Heart2h 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

Introduction to the Endocrine System

Anatomy & Physiology

16. The Endocrine System

Introduction to the Endocrine System

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Multiple Choice

Why do steroid hormones use a transport protein?

Transport proteins allow steroid hormones to cross the cell membrane leading to a cellular response.

Transport proteins stabilize the hormones, so they don’t react chemically with the blood.

Transport proteins make steroid hormones temporarily lipid soluble.

Transport proteins make steroid hormones temporarily water soluble.

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Verified step by step guidance

Understand the nature of steroid hormones: Steroid hormones are derived from cholesterol, making them lipid-soluble. This means they can easily pass through cell membranes but have difficulty traveling in the aqueous environment of the bloodstream.

Recognize the role of transport proteins: In the bloodstream, steroid hormones need to be transported to their target cells. Since the blood is primarily water, lipid-soluble hormones require a mechanism to travel efficiently without being degraded or precipitated.

Identify the function of transport proteins: Transport proteins bind to steroid hormones, making them temporarily water-soluble. This binding allows the hormones to be carried through the bloodstream without reacting with other components or being broken down.

Consider the stability provided by transport proteins: By binding to transport proteins, steroid hormones are protected from enzymatic degradation and are maintained in a stable form until they reach their target cells.

Conclude with the correct answer: The primary reason steroid hormones use transport proteins is to make them temporarily water-soluble, facilitating their transport through the aqueous environment of the bloodstream to reach their target cells.