Lesson 8

Question 1

Reflex

Answer 1

Automatic and involuntary response to a stimulus

Question 2

Relay neurons

Answer 2

Relay neurons function to relay or pass the nerve impulse from sensory neurons to motor neurons ( also translates information sensory to mechanical command )

Question 3

Main types of sensory neurons ( 5 )

Answer 3

• thermoreceptors
  -photoreceptors ( chnages in light )
• chemoreceptors( responds to chnages in chemicals associated with odor, taste and dissolved substances in the blood )
• mechanoreceptors ( chnages in pressure or touch )
• sonoreceptors

Question 4

Summarize chain of events ( 7 )

Answer 4

1. Sensory neuron receptors perceive stimulus
2. Stimulus travels along teh sensory neurons in the nerve impulse
3. The nerve impulse reaches teh spinal cord
4. The nerve impulse travels to the relay neurons
5. Relay neurons pass nerve impulse to motor neurons
6. Motor Carries to muscle cells
7. Muscle cells ( effectors ) respond appropriately to nerve impulse