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 of the following muscles is involved in producing horizontal wrinkles in the forehead?

Orbicularis oculi

Frontalis

Masseter

Zygomaticus major

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Verified step by step guidance

Step 1: Understand the function of the muscles listed in the problem. The goal is to identify which muscle is responsible for producing horizontal wrinkles in the forehead.

Step 2: Recall the anatomy and function of the frontalis muscle. The frontalis is part of the epicranius muscle group and is located in the forehead. Its primary function is to elevate the eyebrows and create horizontal wrinkles in the skin of the forehead.

Step 3: Compare the function of the frontalis muscle with the other muscles listed. The orbicularis oculi is responsible for closing the eyelids, the masseter is involved in mastication (chewing), and the zygomaticus major is responsible for elevating the corners of the mouth (smiling). None of these muscles are involved in creating horizontal wrinkles in the forehead.

Step 4: Confirm that the frontalis muscle is the correct answer based on its anatomical location and function. It is the only muscle listed that directly contributes to the formation of horizontal wrinkles in the forehead.

Step 5: Conclude that the correct answer is the frontalis muscle, as it matches the description provided in the problem and its function aligns with the production of horizontal wrinkles in the forehead.