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

8. Joints

Joint Movements

Anatomy & Physiology

8. Joints

Joint Movements

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2:02 minutes

Problem 11

Textbook Question

Rotation of the forearm that makes the palm face posteriorly is
(a) Supination
(b) Pronation
(c) Proliferation
(d) Projection

Verified step by step guidance

Step 1: Understand the anatomical terms related to forearm movement. Supination and pronation are specific movements of the forearm that involve the rotation of the radius and ulna bones.

Step 2: Recall the definition of supination. Supination is the rotation of the forearm that turns the palm to face anteriorly (upward in anatomical position).

Step 3: Recall the definition of pronation. Pronation is the rotation of the forearm that turns the palm to face posteriorly (downward in anatomical position).

Step 4: Eliminate the incorrect options. Proliferation refers to cell growth and division, and projection is a term used in other contexts, such as neural pathways or imaging. These are not related to forearm rotation.

Step 5: Based on the definitions, identify the correct term for the rotation of the forearm that makes the palm face posteriorly as pronation.

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Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Supination

Supination is the rotational movement of the forearm that turns the palm to face upward or forward. In anatomical terms, it occurs when the radius and ulna are parallel, allowing the palm to face anteriorly. This movement is commonly associated with actions like holding a bowl of soup.

Pronation

Pronation is the opposite of supination; it involves the rotation of the forearm that turns the palm to face downward or posteriorly. During pronation, the radius crosses over the ulna, which is essential for various activities such as typing or using tools. Understanding this movement is crucial for grasping how the forearm functions in different tasks.

Anatomical Position

The anatomical position is a standard reference point in anatomy where the body is standing upright, facing forward, with arms at the sides and palms facing forward. This position serves as a baseline for describing movements and orientations in the body, making it easier to understand terms like supination and pronation in relation to the forearm.