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

What is a reflex in the context of the nervous system?

An involuntary and nearly instantaneous movement in response to a stimulus

A conscious decision to move a muscle

A delayed response to a stimulus

A voluntary response to a stimulus

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Verified step by step guidance

Begin by understanding the concept of a reflex in the nervous system. A reflex is an automatic and rapid response to a stimulus, which does not involve conscious thought.

Recognize that reflexes are involuntary actions. This means they occur without the need for conscious decision-making, allowing the body to respond quickly to certain stimuli.

Identify the components involved in a reflex action: the sensory receptor, sensory neuron, integration center (often in the spinal cord), motor neuron, and effector (muscle or gland).

Understand the pathway of a reflex arc: the stimulus is detected by sensory receptors, which send signals through sensory neurons to the spinal cord. The spinal cord processes the information and sends signals back through motor neurons to the effector, resulting in a response.

Differentiate reflex actions from voluntary actions, which require conscious thought and decision-making, and are typically slower than reflex actions.