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

The soleus, gastrocnemius, and the tibialis anterior are all major muscles of the lower leg. The gastrocnemius and the soleus are both located in the posterior region of the calf, while the tibialis anterior is located in the anterior region of the lower leg. Based only on this information, which statement do you think is most likely true?

The gastrocnemius and the soleus are antagonists.

The soleus and the tibialis anterior are synergists.

The tibialis anterior is a fixator for the gastrocnemius and the soleus.

The gastrocnemius and the tibialis anterior are antagonists.

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Verified step by step guidance

Identify the location and function of each muscle: The gastrocnemius and soleus are located in the posterior region of the calf and are primarily involved in plantar flexion of the foot. The tibialis anterior is located in the anterior region of the lower leg and is primarily involved in dorsiflexion of the foot.

Understand the concept of antagonistic muscles: Antagonistic muscles are pairs of muscles that work against each other to move a joint. When one muscle contracts, the other muscle relaxes, allowing for movement in opposite directions.

Analyze the actions of the muscles: The gastrocnemius and soleus muscles cause plantar flexion, which points the toes downward. The tibialis anterior causes dorsiflexion, which lifts the toes upward.

Determine the relationship between the muscles: Since the gastrocnemius and soleus perform the opposite action to the tibialis anterior, they are considered antagonists. This means they work against each other to control the movement of the foot.

Conclude that the statement 'The gastrocnemius and the tibialis anterior are antagonists' is most likely true based on their opposing actions in the movement of the foot.