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

15. The Special Senses

Introduction to Special Senses

Anatomy & Physiology

15. The Special Senses

Introduction to Special Senses

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Multiple Choice

Which medication causes the pupil to constrict?

Phenylephrine

Atropine

Epinephrine

Pilocarpine

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Verified step by step guidance

Understand the function of the pupil: The pupil is the opening in the center of the iris that regulates the amount of light entering the eye. It constricts (gets smaller) in bright light and dilates (gets larger) in dim light.

Identify the role of the parasympathetic nervous system: The parasympathetic nervous system is responsible for constricting the pupil through the action of the sphincter pupillae muscle.

Recognize the action of Pilocarpine: Pilocarpine is a medication that acts as a parasympathomimetic agent, meaning it mimics the action of the parasympathetic nervous system, leading to pupil constriction.

Differentiate the other medications: Phenylephrine and Epinephrine are sympathomimetic agents that typically cause pupil dilation. Atropine is an anticholinergic agent that blocks the action of the parasympathetic nervous system, also leading to pupil dilation.

Conclude that Pilocarpine is the medication that causes the pupil to constrict by mimicking the action of the parasympathetic nervous system.