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

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

Paralysis of which of the following muscles would make an individual unable to flex the hip?

Biceps femoris

Iliopsoas

Gluteus maximus

Adductor longus

Previous problemNext problem

Verified step by step guidance

Step 1: Understand the action of hip flexion. Hip flexion refers to the movement where the thigh is brought closer to the torso, decreasing the angle between the femur and the pelvis.

Step 2: Identify the primary muscles responsible for hip flexion. The iliopsoas muscle group, which includes the psoas major and iliacus, is the primary muscle responsible for flexing the hip. Other muscles, such as the rectus femoris, also assist in this action.

Step 3: Analyze the function of each muscle listed in the problem. The biceps femoris is part of the hamstring group and primarily functions in knee flexion and hip extension. The gluteus maximus is responsible for hip extension and external rotation. The adductor longus primarily aids in hip adduction. None of these muscles are primarily involved in hip flexion.

Step 4: Focus on the iliopsoas muscle. Paralysis of the iliopsoas would directly impair the ability to flex the hip because it is the primary muscle responsible for this movement.

Step 5: Conclude that the correct answer is iliopsoas, as its paralysis would make an individual unable to flex the hip, unlike the other muscles listed, which do not play a primary role in hip flexion.