1. Reflex Lecture
Chapter 7

2. Reflex Rapid, predictable, and involuntary responses to stimuli
Once a reflex begins, it always follows the same path

3. Types of Reflexes Autonomic
Regulate the activity of the smooth muscles, heart and glands
Examples: saliva, digestion, blood pressure, sweating

4. 2. Somatic Stimulate skeletal muscles
Example: reflex when you touch a hot surface

5. Reflex Arc neural path of a reflex Minimum of 5 parts
1. sensory receptor (reacts to stimulus)
2. afferent neuron (neuron going to CNS)
3. integration center (CNS- spinal cord)
4. efferent neuron (neuron going away from CNS)
5. effector organ (muscle or gland stimulated)

6. Steps to Patellar Reflex
Sensory receptor senses strike to patellar tendon
Afferent neuron sends stimulus to CNS
Integration center (spinal cord) responds to stimulus

7. 4. Efferent neuron sends message to muscle
5. Muscle contracts causing knee to jerk

8. Flexor Withdrawal Reflex
What would be the steps for the flexor withdrawal reflex if you were to accidentally touch a hot stove?

9. Pain receptors in hand sense heat
Afferent neuron sends message to CNS
Integration center (CNS-spinal cord) responds
Efferent neuron sends response to muscle
Bicep muscle contracts and forces hand to be removed from stove