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

What initiates the micturition reflex in the urinary system?

Contraction of the urethral sphincter

Hormonal signals from the adrenal gland

Increased blood pressure

Stretch receptors in the bladder wall

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Verified step by step guidance

Understand the anatomy of the urinary system: The bladder is a muscular sac that stores urine, and its walls contain stretch receptors.

Learn about the micturition reflex: This is a process that involves the nervous system to control the release of urine from the bladder.

Identify the role of stretch receptors: These receptors are sensitive to the stretching of the bladder wall as it fills with urine.

Recognize the initiation of the reflex: When the bladder fills and stretches, these receptors send signals to the spinal cord.

Understand the response: The spinal cord processes these signals and sends a response back to the bladder, initiating the micturition reflex, which leads to the contraction of the bladder muscles and relaxation of the urethral sphincter to allow urination.