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 Naming

Anatomy & Physiology

10. Muscles

Muscle Naming

Previous problemNext problem

2:55 minutes

Problem 13

Textbook Question

Knee extensors known as the quadriceps femoris consist of the
(a) Three vastus muscles and the rectus femoris
(b) Biceps femoris, gracilis, and sartorius
(c) Popliteus, iliopsoas, and gracilis
(d) Gastrocnemius, tibialis, and peroneus

Verified step by step guidance

Step 1: Understand the anatomy of the knee extensors, which are responsible for extending the knee joint. These muscles are part of the anterior compartment of the thigh.

Step 2: Recall that the quadriceps femoris is a group of four muscles located in the front of the thigh. These muscles include the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius.

Step 3: Eliminate options that do not include the quadriceps femoris muscles. For example, options (b), (c), and (d) list muscles that are not part of the quadriceps femoris group.

Step 4: Focus on option (a), which correctly identifies the three vastus muscles (vastus lateralis, vastus medialis, and vastus intermedius) along with the rectus femoris as the components of the quadriceps femoris.

Step 5: Confirm that the quadriceps femoris is the primary muscle group responsible for knee extension, making option (a) the correct association.

Verified video answer for a similar problem:

This video solution was recommended by our tutors as helpful for the problem above

Video duration:

Play a video:

Was this helpful?

Key Concepts

Here are the essential concepts you must grasp in order to answer the question correctly.

Quadriceps Femoris

The quadriceps femoris is a group of four muscles located at the front of the thigh, primarily responsible for knee extension. It consists of the rectus femoris, vastus lateralis, vastus medialis, and vastus intermedius. Understanding this muscle group is essential for recognizing its role in movements such as walking, running, and jumping.

Muscle Anatomy

Muscle anatomy refers to the structure and organization of muscles in the body. It includes knowledge of different muscle groups, their origins, insertions, and functions. Familiarity with muscle anatomy is crucial for identifying which muscles are involved in specific movements and understanding their interactions during physical activity.

Knee Joint Function

The knee joint is a hinge joint that allows for flexion and extension of the leg. It plays a vital role in weight-bearing activities and stability during movement. Understanding the function of the knee joint helps in comprehending how the quadriceps femoris contributes to overall leg mechanics and athletic performance.