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

Which of the following muscles is a flexor of the thigh?

Vastus lateralis

Gluteus maximus

Iliopsoas

Biceps femoris

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Verified step by step guidance

Understand the function of each muscle listed in the options. The vastus lateralis is part of the quadriceps group and primarily extends the knee. The gluteus maximus is responsible for extending and laterally rotating the thigh. The biceps femoris, part of the hamstring group, primarily flexes the knee and extends the hip.

Identify the muscle that flexes the thigh. Flexion of the thigh involves decreasing the angle between the thigh and the pelvis, typically bringing the thigh forward.

Recognize that the iliopsoas muscle is composed of the psoas major and the iliacus muscles. This muscle group is located in the pelvic region and is primarily responsible for flexing the thigh at the hip joint.

Consider the anatomical position and the action of the iliopsoas. When the iliopsoas contracts, it pulls the femur upward, flexing the thigh at the hip joint.

Conclude that the iliopsoas is the correct answer as it is the primary flexor of the thigh, unlike the other muscles listed which have different primary functions.