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

Active Transport

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Active Transport

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Multiple Choice

Which of the following correctly describes a general property of all electrogenic pumps?

Electrogenic pumps pump sodium out of the cell and potassium into the cell.

Electrogenic pumps can pump a large variety of solutes across a membrane against their concentration gradient.

Electrogenic pumps result in a cell with an interior that is positively charged relative to the outside the cell.

Electrogenic pumps result in a cell with a high internal concentration of protons.

Electrogenic pumps create a voltage difference across the membrane.

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Verified step by step guidance

Understand the role of electrogenic pumps: Electrogenic pumps are membrane proteins that move ions across a cell membrane, creating an electrical gradient (voltage difference) by transporting charged particles.

Identify the most common example: The sodium-potassium pump (Na+/K+ pump) is a well-known electrogenic pump that moves 3 sodium ions out of the cell and 2 potassium ions into the cell, contributing to the voltage difference across the membrane.

Analyze the options: Consider each statement in the context of what electrogenic pumps do. They do not necessarily pump sodium and potassium, nor do they result in a positively charged interior or high internal proton concentration.

Focus on the voltage difference: The primary function of electrogenic pumps is to create and maintain a voltage difference across the membrane by moving ions, which is crucial for various cellular processes.

Conclude with the correct property: The defining characteristic of electrogenic pumps is their ability to create a voltage difference across the membrane, which is essential for maintaining the cell's electrochemical gradient.