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

Anatomical Terms for the Head and Neck

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Anatomical Terms for the Head and Neck

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Multiple Choice

Which of the following cranial nerves contain preganglionic parasympathetic fibers?

Olfactory (I), Optic (II), Vestibulocochlear (VIII), and Trochlear (IV)

Trigeminal (V), Abducens (VI), Accessory (XI), and Hypoglossal (XII)

Facial (VII), Trigeminal (V), Vagus (X), and Accessory (XI)

Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X)

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Verified step by step guidance

Step 1: Understand the concept of preganglionic parasympathetic fibers. These fibers are part of the autonomic nervous system and originate in the brainstem, traveling to parasympathetic ganglia where they synapse with postganglionic neurons. Their role is to regulate involuntary functions such as digestion, heart rate, and glandular activity.

Step 2: Review the cranial nerves that are associated with parasympathetic functions. Not all cranial nerves carry parasympathetic fibers; only specific ones are involved in parasympathetic innervation.

Step 3: Identify the cranial nerves that contain preganglionic parasympathetic fibers. These are: Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X). Each of these nerves has specific parasympathetic functions, such as controlling pupil constriction, salivation, and visceral organ activity.

Step 4: Compare the options provided in the problem. Eliminate the groups of cranial nerves that do not include the correct combination of Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X). For example, Olfactory (I), Optic (II), Vestibulocochlear (VIII), and Trochlear (IV) do not have parasympathetic fibers.

Step 5: Confirm the correct answer by matching the cranial nerves listed in the problem to the known parasympathetic cranial nerves. The correct answer is Oculomotor (III), Facial (VII), Glossopharyngeal (IX), and Vagus (X), as these are the cranial nerves that contain preganglionic parasympathetic fibers.