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

2. Cell Chemistry & Cell Components

Biological Membranes

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Biological Membranes

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Multiple Choice

What is the relationship between steroid hormones and cell membranes?

Steroid hormones bind to membrane-bound receptors to initiate a response.

Steroid hormones pass through the cell membrane and bind to intracellular receptors.

Steroid hormones are unable to cross the cell membrane and rely on secondary messengers.

Steroid hormones are transported across the cell membrane by carrier proteins.

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Verified step by step guidance

Understand the nature of steroid hormones: Steroid hormones are lipophilic (fat-soluble) molecules derived from cholesterol, which allows them to easily pass through the lipid bilayer of cell membranes.

Recognize the structure of cell membranes: Cell membranes are composed of a phospholipid bilayer with embedded proteins, which is selectively permeable to different substances.

Identify how steroid hormones interact with cell membranes: Due to their lipophilic nature, steroid hormones can diffuse directly through the phospholipid bilayer of the cell membrane without the need for membrane-bound receptors or carrier proteins.

Determine the location of steroid hormone receptors: Once inside the cell, steroid hormones bind to specific intracellular receptors located in the cytoplasm or nucleus.

Understand the mechanism of action: The hormone-receptor complex then translocates to the nucleus, where it can influence gene expression by acting as a transcription factor, leading to the desired cellular response.