Label these parts of the knee jerk reaction

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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Label these parts of the knee jerk reaction

**The Reflex Arc - An Illustrative Diagram**

This diagram represents the reflex arc, a neural pathway that controls a reflex action. 

- **Left Side (Muscle and Knee Reflex):** Depicted here is a segment of the human body, specifically focusing on the knee and the associated muscles and nerves. An arrow is pointing towards the area where a common reflex test is performed by tapping just below the kneecap.
  
- **Middle Section (Neuron Pathway):** The diagram transitions to display an elongated sensory neuron. Notably marked is the "sensory neuron cell body," which is crucial for transmitting nerve impulses. This neuron extends to connect with other neurons, facilitating the reflex action.
  
- **Right Side (Spinal Cord and Integration Center):** Here, the illustration shows the spinal cord and the integration center where the sensory neuron makes contact with a motor neuron. Once activated, the motor neuron sends a signal back to the muscles, resulting in a reflex movement.

The arrows throughout the diagram indicate the direction of nerve impulses during the reflex arc: starting from the point of stimulus (knee tap), moving through the sensory neuron, reaching the spinal cord, and then transmitting a response back through the motor neuron to the muscle, causing it to contract.

This reflex pathway enables an automatic and rapid response to certain stimuli, demonstrating how the human body can react almost instantaneously to ensure protection and immediate action.
Transcribed Image Text:**The Reflex Arc - An Illustrative Diagram** This diagram represents the reflex arc, a neural pathway that controls a reflex action. - **Left Side (Muscle and Knee Reflex):** Depicted here is a segment of the human body, specifically focusing on the knee and the associated muscles and nerves. An arrow is pointing towards the area where a common reflex test is performed by tapping just below the kneecap. - **Middle Section (Neuron Pathway):** The diagram transitions to display an elongated sensory neuron. Notably marked is the "sensory neuron cell body," which is crucial for transmitting nerve impulses. This neuron extends to connect with other neurons, facilitating the reflex action. - **Right Side (Spinal Cord and Integration Center):** Here, the illustration shows the spinal cord and the integration center where the sensory neuron makes contact with a motor neuron. Once activated, the motor neuron sends a signal back to the muscles, resulting in a reflex movement. The arrows throughout the diagram indicate the direction of nerve impulses during the reflex arc: starting from the point of stimulus (knee tap), moving through the sensory neuron, reaching the spinal cord, and then transmitting a response back through the motor neuron to the muscle, causing it to contract. This reflex pathway enables an automatic and rapid response to certain stimuli, demonstrating how the human body can react almost instantaneously to ensure protection and immediate action.
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