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

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

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Multiple Choice

Which of the following cranial nerves mediates the corneal reflex?

Facial nerve (Cranial Nerve VII)

Optic nerve (Cranial Nerve II)

Oculomotor nerve (Cranial Nerve III)

Trigeminal nerve (Cranial Nerve V)

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Verified step by step guidance

Understand the corneal reflex: The corneal reflex is a protective mechanism that causes blinking when the cornea is touched or irritated. It involves both sensory and motor components.

Identify the sensory component: The sensory input for the corneal reflex is mediated by the ophthalmic branch of the trigeminal nerve (Cranial Nerve V). This branch detects the stimulus on the cornea and sends signals to the brainstem.

Identify the motor component: The motor response (blinking) is controlled by the facial nerve (Cranial Nerve VII), which innervates the orbicularis oculi muscle responsible for closing the eyelids.

Clarify the role of the trigeminal nerve: The trigeminal nerve (Cranial Nerve V) is responsible for detecting the initial stimulus on the cornea, making it the correct answer for the nerve mediating the corneal reflex.

Review the incorrect options: The optic nerve (Cranial Nerve II) is involved in vision, not reflexes. The oculomotor nerve (Cranial Nerve III) controls eye movements and pupil constriction, but does not mediate the corneal reflex. The facial nerve (Cranial Nerve VII) is involved in the motor response, not the sensory detection.