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

The Kidneys

Anatomy & Physiology

25. The Urinary System

The Kidneys

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Multiple Choice

Approximately how many nephrons are found in each human kidney?

About 1 million

About 10 million

About 100,000

About 10,000

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Verified step by step guidance

Step 1: Begin by understanding the structure and function of the nephron. Nephrons are the microscopic functional units of the kidney responsible for filtering blood and forming urine.

Step 2: Recall that the human kidney is highly efficient and contains a large number of nephrons to perform its filtration tasks. This number is consistent across individuals unless affected by disease or injury.

Step 3: Review the typical range of nephron counts in a healthy human kidney. Studies and textbooks in Anatomy & Physiology commonly state that each kidney contains approximately 1 million nephrons.

Step 4: Eliminate the other options based on their numerical values. For example, 10 million nephrons per kidney is far too high, while 100,000 or 10,000 nephrons are far too low to support the kidney's filtration needs.

Step 5: Conclude that the correct answer is 'About 1 million,' as this aligns with the standard anatomical and physiological data for nephron count in a human kidney.