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

Which of the following muscles is primarily responsible for flexing the forearm at the elbow joint?

Triceps brachii

Pectoralis major

Biceps brachii

Deltoid

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Verified step by step guidance

Begin by understanding the anatomy of the elbow joint and the muscles involved in its movement. The elbow joint is a hinge joint that primarily allows for flexion and extension of the forearm.

Identify the muscles listed in the problem: Triceps brachii, Pectoralis major, Biceps brachii, and Deltoid. Each of these muscles has specific functions related to movement.

Consider the function of each muscle: The Triceps brachii is responsible for extending the forearm at the elbow joint. The Pectoralis major is involved in movements of the shoulder, such as adduction and rotation. The Deltoid is primarily responsible for shoulder abduction.

Focus on the Biceps brachii: This muscle is located in the upper arm and is primarily responsible for flexing the forearm at the elbow joint. It works by contracting and pulling the forearm upwards, decreasing the angle between the forearm and the upper arm.

Conclude that the Biceps brachii is the correct muscle responsible for flexing the forearm at the elbow joint, as it is specifically designed for this action, unlike the other muscles listed.