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

10. Muscles

Muscle Actions

Anatomy & Physiology

10. Muscles

Muscle Actions

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Multiple Choice

The temporalis muscle ______ the mandible.

depresses

rotates

elevates

protracts

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Verified step by step guidance

Step 1: Begin by identifying the location and function of the temporalis muscle. The temporalis is a broad, fan-shaped muscle located on the side of the skull, primarily involved in jaw movement.

Step 2: Understand the primary action of the temporalis muscle. It is responsible for elevating the mandible, which means it helps close the jaw during chewing or biting.

Step 3: Review the definitions of the options provided: 'depresses' means lowering the mandible, 'rotates' refers to turning or twisting, 'elevates' means raising the mandible, and 'protracts' means moving the mandible forward.

Step 4: Compare the function of the temporalis muscle with the options. Since the temporalis muscle is involved in raising the mandible, the correct action is 'elevates.'

Step 5: Confirm your understanding by recalling that the temporalis muscle works in conjunction with other muscles like the masseter to perform elevation of the mandible during mastication (chewing).