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

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

Anatomy & Physiology

9. Muscle Tissue

Introduction to Muscles and Muscle Tissue

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Multiple Choice

Which muscle elevates and protracts the mandible during mastication?

Medial pterygoid

Buccinator

Masseter

Temporalis

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Verified step by step guidance

Step 1: Understand the function of mastication (chewing) and the role of muscles involved in this process. Mastication requires the movement of the mandible (jawbone) for actions like elevation (closing the jaw) and protraction (moving the jaw forward).

Step 2: Review the specific actions of the listed muscles: Medial pterygoid, Buccinator, Masseter, and Temporalis. Identify which of these muscles are responsible for elevating and protracting the mandible.

Step 3: Recall that the Medial pterygoid muscle assists in both elevation and protraction of the mandible. It works in conjunction with the Masseter muscle to elevate the mandible and contributes to protraction by pulling the mandible forward.

Step 4: Note that the Buccinator muscle is primarily involved in compressing the cheeks during actions like blowing or sucking, not in elevating or protracting the mandible. The Temporalis muscle is involved in elevation and retraction (pulling the mandible backward), not protraction.

Step 5: Based on the functional roles of these muscles, determine that the Medial pterygoid is the correct answer for elevating and protracting the mandible during mastication.