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 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

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

Which of the following is a correct difference between active transport and facilitated diffusion?

Active transport involves transport proteins, and facilitated diffusion does not.

Facilitated diffusion can move solutes against a concentration gradient, and active transport cannot.

Facilitated diffusion requires carrier proteins, but active transport requires channel proteins.

Facilitated diffusion involves transport proteins, and active transport does not.

Active transport requires an input of energy, and facilitated diffusion does not.

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Verified step by step guidance

Begin by understanding the basic definitions of active transport and facilitated diffusion. Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy input, usually in the form of ATP. Facilitated diffusion, on the other hand, is the passive movement of molecules along the concentration gradient, aided by transport proteins, without the need for energy.

Identify the role of transport proteins in both processes. Facilitated diffusion involves transport proteins such as carrier proteins or channel proteins that help move substances across the cell membrane. Active transport also involves transport proteins but requires energy to move substances against the concentration gradient.

Consider the energy requirements of each process. Active transport requires energy because it moves substances against their concentration gradient, which is energetically unfavorable. Facilitated diffusion does not require energy because it moves substances down their concentration gradient, which is energetically favorable.

Evaluate the direction of movement relative to the concentration gradient. Facilitated diffusion moves substances from an area of higher concentration to an area of lower concentration, while active transport moves substances from an area of lower concentration to an area of higher concentration.

Conclude by comparing the processes based on energy input. The correct difference between active transport and facilitated diffusion is that active transport requires an input of energy, while facilitated diffusion does not.