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 may occur if the biceps brachii has an elevated neural drive?

Decreased muscle contraction

Increased force of elbow flexion

Reduced blood flow to the muscle

Inhibition of the triceps brachii

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Verified step by step guidance

Understand the concept of neural drive: Neural drive refers to the activation signal sent from the nervous system to the muscle fibers, which influences the strength and efficiency of muscle contraction.

Analyze the role of the biceps brachii: The biceps brachii is a muscle located in the upper arm responsible for elbow flexion (bending the arm at the elbow). Increased neural drive to this muscle would enhance its ability to contract forcefully.

Evaluate the options: Increased neural drive typically results in stronger muscle contractions, which would lead to an increased force of elbow flexion. This aligns with the function of the biceps brachii.

Consider the physiological effects: Elevated neural drive does not directly cause decreased muscle contraction or reduced blood flow. Instead, it enhances muscle activation. Additionally, inhibition of the triceps brachii (the antagonist muscle) may occur to allow smoother elbow flexion, but this is not the primary effect of increased neural drive to the biceps brachii.

Conclude the reasoning: Based on the analysis, the correct answer is 'Increased force of elbow flexion,' as this is the most direct result of elevated neural drive to the biceps brachii.