Plant Responses Flashcards

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1
Q

What is reflex action?

A

The body responding to situations without conscious thought- A involuntary response to a sensory stimulus.

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2
Q

What are the pathway of neurones involved in reflex action?

A

Receptor - detects stimulus and creates an action potential in the sensory neurone.

Sensory neurone - carries impulse to spinal cord.

Relay neurone - connects the sensory neurone to the motor neurone within the spinal cord or brain.

Motor neurone - carries impulse to the effector to carry out the appropriate response.

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3
Q

What is the spinal cord?

A

The spinal cord is a column of nervous tissues running up the back.

Surrounded by the spine for protection

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4
Q

Describe the knee jerk reflex?

A
  • Is a spinal reflex- neural circuit only goes to the spinal cord.
  • when the leg is tapped at the patella (below kneecap)
    -stretches the patella tendon and acts as a stimulus.
  • stimulus initiates a reflex
    -causes extensor muscles (top of thigh) to contract
    -
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