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

Introduction to Membrane Transport

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Membrane Transport

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Multiple Choice

How do gated channels function in the regulation of sodium and potassium ions across the cell membrane?

Gated channels open or close in response to specific stimuli, allowing selective ion passage.

Gated channels permanently remain open to allow free movement of ions.

Gated channels randomly open and close without any specific trigger.

Gated channels actively transport ions against their concentration gradient using ATP.

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Verified step by step guidance

Understand the concept of gated channels: Gated channels are specialized protein structures embedded in the cell membrane that regulate the flow of ions such as sodium (Na+) and potassium (K+) across the membrane.

Identify the types of stimuli that can trigger gated channels: These stimuli can be chemical (ligand-gated), electrical (voltage-gated), or mechanical. Each type of gated channel responds to specific conditions or signals.

Explore how gated channels selectively allow ion passage: When a gated channel opens in response to a stimulus, it allows specific ions to pass through based on the channel's selectivity, which is determined by the size and charge of the ions.

Differentiate between passive and active transport: Gated channels facilitate passive transport, meaning ions move along their concentration gradient without the use of ATP. This is different from active transport, which requires energy to move ions against their gradient.

Clarify the role of gated channels in maintaining cellular homeostasis: By regulating the flow of sodium and potassium ions, gated channels help maintain the cell's resting membrane potential and are crucial for processes like nerve impulse transmission and muscle contraction.