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

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Each kidney has about one million of which structure, the functional unit responsible for urine formation?

Nephrons

Calyces

Glomeruli

Renal pyramids

Previous problemNext problem

Verified step by step guidance

Step 1: Begin by understanding the anatomy of the kidney. The kidney is composed of several structures, including the renal cortex, renal medulla, renal pyramids, calyces, and the functional units called nephrons.

Step 2: Recall the definition of a nephron. A nephron is the microscopic functional unit of the kidney responsible for filtering blood, reabsorbing essential substances, and forming urine.

Step 3: Differentiate between the other options provided. Calyces are structures that collect urine from the renal pyramids and funnel it into the renal pelvis. Glomeruli are part of the nephron, specifically the capillary network involved in filtration. Renal pyramids are cone-shaped tissues in the medulla that contain collecting ducts but are not functional units themselves.

Step 4: Focus on the key phrase 'functional unit responsible for urine formation.' Nephrons are the only structures that fit this description, as they perform filtration, reabsorption, secretion, and excretion processes to form urine.

Step 5: Conclude that the correct answer is 'Nephrons,' as they are the functional units of the kidney responsible for urine formation.