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 component of a reflex arc carries the nerve signal to the effector?

Interneuron

Receptor

Sensory neuron

Motor neuron

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Verified step by step guidance

Understand the components of a reflex arc: A reflex arc is the neural pathway that controls a reflex. It typically includes five main components: receptor, sensory neuron, interneuron, motor neuron, and effector.

Identify the role of each component: The receptor detects the stimulus, the sensory neuron transmits the signal to the central nervous system (CNS), the interneuron processes the signal within the CNS, the motor neuron carries the signal from the CNS to the effector, and the effector performs the response.

Focus on the question: The problem asks which component carries the nerve signal to the effector. Recall that the effector is the structure (e.g., muscle or gland) that performs the action in response to the reflex.

Match the correct component: The motor neuron is responsible for transmitting the nerve signal from the CNS to the effector, enabling the response to occur.

Confirm understanding: Review the roles of the other components (interneuron, receptor, sensory neuron) to ensure clarity and verify why they do not carry the signal to the effector.