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

25. The Urinary System

Introduction to the Urinary System

Anatomy & Physiology

25. The Urinary System

Introduction to the Urinary System

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Multiple Choice

Why is the dialysate continually replaced during hemodialysis?

To maintain a concentration gradient for waste removal from the blood

To increase the blood pressure of the patient

To prevent blood from clotting in the dialysis machine

To supply oxygen directly to the blood

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Verified step by step guidance

Understand the purpose of hemodialysis: Hemodialysis is a medical procedure used to remove waste products, toxins, and excess fluids from the blood when the kidneys are not functioning properly. The dialysate plays a key role in this process.

Learn about the dialysate: Dialysate is a specially formulated fluid that helps draw waste products and toxins out of the blood through diffusion. It contains a balanced concentration of electrolytes and other substances to facilitate this exchange.

Recognize the importance of the concentration gradient: Waste removal during hemodialysis relies on the principle of diffusion, where substances move from an area of higher concentration (blood) to an area of lower concentration (dialysate). To maintain this gradient, the dialysate must be continually replaced.

Consider the consequences of not replacing the dialysate: If the dialysate is not replaced, it will become saturated with waste products, reducing the concentration gradient and making the removal of toxins from the blood less effective.

Connect the explanation to the correct answer: The dialysate is continually replaced to ensure the concentration gradient is maintained, allowing efficient waste removal from the blood during hemodialysis. This aligns with the correct answer provided in the problem.