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

13. The Peripheral Nervous System

Reflex Arcs

Anatomy & Physiology

13. The Peripheral Nervous System

Reflex Arcs

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Multiple Choice

Which of the following accurately describes a reflex arc?

A reflex arc requires conscious thought to initiate a response.

A reflex arc is a voluntary response to a stimulus.

A reflex arc is a neural pathway that controls an action reflex.

A reflex arc involves only the brain and not the spinal cord.

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Begin by understanding the concept of a reflex arc. A reflex arc is a neural pathway that controls reflex actions, which are automatic and involuntary responses to stimuli.

Identify the components of a reflex arc. Typically, it includes a sensory receptor, a sensory neuron, an integration center (often in the spinal cord), a motor neuron, and an effector (such as a muscle or gland).

Consider the role of the spinal cord in a reflex arc. Reflex arcs often involve the spinal cord as the integration center, allowing for rapid responses without the need for conscious thought or brain involvement.

Evaluate the statements given in the problem. A reflex arc does not require conscious thought, is not voluntary, and involves the spinal cord rather than only the brain.

Conclude that the correct description of a reflex arc is: 'A reflex arc is a neural pathway that controls an action reflex.' This statement accurately reflects the automatic and involuntary nature of reflex arcs.