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

What is the primary action of the rectus femoris muscle?

Flexion of the knee

Abduction of the thigh

Extension of the knee and flexion of the hip

Adduction of the thigh

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Verified step by step guidance

Understand the anatomy of the rectus femoris muscle: It is one of the four muscles that make up the quadriceps group, located in the anterior compartment of the thigh.

Identify the origin and insertion points of the rectus femoris: The muscle originates from the anterior inferior iliac spine and the superior margin of the acetabulum, and inserts into the patellar tendon, which connects to the tibial tuberosity.

Analyze the primary actions based on its anatomical position: The rectus femoris crosses both the hip and knee joints, allowing it to perform two distinct actions.

Determine the actions at the knee joint: Since the rectus femoris is part of the quadriceps group, it contributes to knee extension by pulling the patella upward and straightening the leg.

Determine the actions at the hip joint: The rectus femoris assists in hip flexion because it originates from the pelvis and crosses the hip joint, pulling the thigh upward toward the torso.