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

Introduction to Organ Systems

Anatomy & Physiology

1. Introduction to Anatomy & Physiology

Introduction to Organ Systems

Previous problemNext problem

Struggling with Anatomy & Physiology?

Join thousands of students who trust us to help them ace their exams!Watch the first video

Multiple Choice

Muscles that move the wrist and hand primarily originate on which bone(s)?

Scapula

Ulna

Radius

Humerus

Previous problemNext problem

Verified step by step guidance

Step 1: Understand the anatomy of the upper limb and identify the bones involved in the movement of the wrist and hand. The humerus is the upper arm bone, while the radius and ulna are the forearm bones. The scapula is the shoulder blade.

Step 2: Recall that muscles responsible for wrist and hand movement are primarily located in the forearm but originate from the humerus. These muscles include flexors and extensors of the wrist and fingers.

Step 3: Learn the concept of muscle origin and insertion. The origin is the fixed attachment point, while the insertion is the movable attachment point. For muscles that move the wrist and hand, the origin is typically on the humerus, and the insertion is on the bones of the wrist or hand.

Step 4: Review the specific muscles involved, such as the flexor carpi radialis, flexor carpi ulnaris, extensor carpi radialis longus, and extensor carpi ulnaris. These muscles originate on the humerus and extend down to the wrist and hand.

Step 5: Confirm that the humerus is the correct answer by understanding that it serves as the origin for the majority of muscles responsible for wrist and hand movement, while the radius and ulna serve as attachment points for these muscles.