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

Passive vs. Active Transport

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Passive vs. Active Transport

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Multiple Choice

What is the difference between active and passive transport across a membrane?

Both active and passive transport move substances down their concentration gradients.

Active transport is ATP dependent. Passive transport does not require energy.

Active transport requires cell to cell communication. Passive transport does not require cell communication.

Active transport can be performed without transport proteins while passive transport cannot.

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Verified step by step guidance

Understand the basic definitions: Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, using energy in the form of ATP. Passive transport is the movement of molecules across a cell membrane from a region of higher concentration to a region of lower concentration, without the use of energy.

Identify the energy requirement: Active transport requires energy, typically in the form of ATP, because it moves substances against their concentration gradient. In contrast, passive transport does not require energy as it moves substances down their concentration gradient.

Consider the role of transport proteins: Active transport often involves specific transport proteins, such as pumps, that facilitate the movement of substances against their concentration gradient. Passive transport can occur through simple diffusion or facilitated diffusion, which may involve channel or carrier proteins but does not require energy.

Examine the direction of movement: In active transport, substances are moved from areas of low concentration to high concentration, which is against the natural flow and requires energy. In passive transport, substances move from areas of high concentration to low concentration, following the natural flow and not requiring energy.

Clarify the involvement of cell communication: Active transport may involve signaling pathways and cell communication to regulate the transport process, whereas passive transport generally does not require such communication as it relies on the natural diffusion process.