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 these events occur during a monosynaptic stretch reflex, such as the knee-jerk reflex?

The response is initiated by the brain.

The reflex involves multiple interneurons in the spinal cord.

The reflex arc includes a withdrawal response.

The sensory neuron directly synapses with the motor neuron.

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Verified step by step guidance

Understand the concept of a monosynaptic reflex: A monosynaptic reflex is the simplest type of reflex arc that involves only one synapse between the sensory neuron and the motor neuron.

Identify the components of the reflex arc: In a monosynaptic reflex, the sensory neuron detects a stimulus and directly synapses with the motor neuron in the spinal cord, without involving interneurons.

Analyze the knee-jerk reflex: This reflex is a classic example of a monosynaptic reflex where tapping the patellar tendon stretches the quadriceps muscle, activating the sensory neurons.

Recognize the role of the sensory neuron: The sensory neuron transmits the signal from the muscle spindle to the spinal cord, where it directly synapses with the motor neuron.

Understand the motor neuron's function: The motor neuron then sends a signal back to the quadriceps muscle, causing it to contract and produce the knee-jerk response.