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 flexes the thigh at the hip?

Gluteus maximus

Iliopsoas

Vastus lateralis

Biceps femoris

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Verified step by step guidance

Step 1: Understand the action of flexion at the hip joint. Flexion refers to the movement that decreases the angle between the thigh and the torso, bringing the thigh closer to the abdomen.

Step 2: Review the primary muscles involved in flexion at the hip. The iliopsoas muscle is the major muscle responsible for this action. It is composed of two parts: the psoas major and the iliacus, which work together to flex the thigh at the hip joint.

Step 3: Analyze the other muscles listed in the problem. The gluteus maximus is primarily responsible for extension and lateral rotation of the thigh at the hip, not flexion. The vastus lateralis is part of the quadriceps group and is involved in knee extension, not hip flexion. The biceps femoris is part of the hamstring group and is involved in knee flexion and hip extension, not flexion.

Step 4: Confirm that the iliopsoas is the correct answer based on its anatomical function. The iliopsoas is located in the anterior region of the hip and is specifically designed to perform flexion at the hip joint.

Step 5: Conclude that the iliopsoas is the correct muscle for flexing the thigh at the hip, as none of the other listed muscles perform this action.