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 Arm and Hand

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Anatomical Terms for the Arm and Hand

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Multiple Choice

Which of the following muscles forms the posterior shoulder?

Pectoralis major

Flexor carpi radialis

Deltoid

Biceps brachii

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Verified step by step guidance

Step 1: Understand the anatomy of the shoulder region. The shoulder is composed of several muscles that contribute to its movement and stability. These muscles are categorized into anterior, posterior, and lateral groups based on their location.

Step 2: Identify the posterior shoulder muscles. The posterior shoulder muscles are located at the back of the shoulder and include muscles such as the deltoid (posterior fibers), trapezius, and infraspinatus.

Step 3: Analyze the options provided. The Pectoralis major is an anterior chest muscle, the Flexor carpi radialis is a forearm muscle involved in wrist flexion, and the Biceps brachii is located in the anterior arm. None of these are posterior shoulder muscles.

Step 4: Focus on the deltoid muscle. The deltoid has three distinct parts: anterior, lateral, and posterior fibers. The posterior fibers of the deltoid muscle are responsible for extending and laterally rotating the arm, making it a posterior shoulder muscle.

Step 5: Conclude that the correct answer is the deltoid muscle, as it is the only muscle listed that forms part of the posterior shoulder.