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 option below best describes a transporter that requires ATP to move molecules A and B out of the cell?

An active antiporter.

A passive antiporter.

A passive symporter.

An active uniporter.

An active symporter.

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Verified step by step guidance

Understand the basic definitions: A transporter is a protein that helps move substances across a cell membrane. Active transport requires energy, usually in the form of ATP, while passive transport does not.

Identify the types of transporters: An antiporter moves two different substances in opposite directions across a membrane. A symporter moves two different substances in the same direction. A uniporter moves one substance in one direction.

Determine the energy requirement: Since the problem specifies that ATP is required, the transporter must be involved in active transport.

Analyze the options: A passive transporter does not use ATP, so both 'passive antiporter' and 'passive symporter' can be eliminated. An 'active uniporter' moves only one molecule, not two, so it can also be eliminated.

Conclude with the correct option: An 'active symporter' would use ATP to move molecules A and B in the same direction out of the cell, which matches the requirement of the problem.