Reflex Actions & Modifying Reflex Actions Flashcards

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1
Q

What is a reflex action?

A

It is a fast, automatic, involuntary response to a stimulus.

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2
Q

What is the first step in the pathway for a reflex arc?

A
  1. A receptor is stimulated
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3
Q

What is the second step in the pathway for a reflex arc?

A
  1. This causes impulses to pass along a sensory neuron into the spinal cord
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4
Q

What is the third step in the pathway for a reflex arc?

A
  1. The sensory neuron synapses with a relay neuron, by-passing the brain
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5
Q

What is the fourth step in the pathway for a reflex arc?

A
  1. The relay neuron synapses with a motor neuron, sending impulses to the effectors
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6
Q

What is the fifth step in the pathway for a reflex arc?

A
  1. The effectors respond
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7
Q

What do simple reflexes like these ensure?

A

That an animal automatically responds to a stimulus in a way that helps it to survive

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8
Q

Give examples of this

A

Finding food
Sheltering predators
Finding a mate

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9
Q

What does the fixed pathway of neurons allow?

A

Very rapid response as there isn’t any processing of the information by the brain

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10
Q

What is a result of reflex actions?

A

The majority of behavior displayed by simple animals.

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11
Q

What is the disadvantage of this?

A

Animals have difficulty responding to new situations

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