Coordination and Response Flashcards

1
Q

Stimulus is ?

A

A change in an animals surroundings

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2
Q

Response is ?

A

A reaction to the change

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3
Q

Receptor Organ

A

Are organs that detect the change

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4
Q

Effector

A

Organs that bring about the response

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5
Q

Stimulus —> ________ —> Coordination —> _________ —> Response

A

Stimulus —> Receptor —> Coordination —> Effector —> Response

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6
Q

The role of the receptor is?

A

To detect the stimulus

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7
Q

Define Homeostasis

A

Maintaining a constant internal environment despite external change

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8
Q

State three conditions which need to be controlled within the body

A
  • Temperature
  • Water Levels
  • Blood glucose concentration
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9
Q

What are the three main parts to a coordinated response?

A
  • A stimulus ( e.g temperature change)
  • A receptor ( to detect the change)
  • An effector ( to carry out the response)
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10
Q

What does auxin trigger

A

Auxin triggers growth of the main stem of the plant

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11
Q

What is phototropism and which part of a plant is positively phototrophic

A

Phototropism is the growth of a plant towards a light source. The shoots are positively phototrophic (they grow towards the light source

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12
Q

What is geotropism and which part of a plant is positively geotropic?

A

Geotropism is the growth of a plant towards the pull of gravity. The roots are positively geotropic (they grow down in the same direction as the pull of gravity).

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13
Q

Give 3 differences between nervous and hormonal communication

A
  • Nervous communication uses nerve cells and impulses whereas hormones are secreted by glands and travel in the blood
  • Nervous communication is generally much faster than hormonal communication
  • Hormonal communication usually brings about longer lasting responses than nervous communication
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14
Q

What is the difference between the central nervous system and the peripheral nervous system

A

The central nervous system is the brain and the spinal cord. The peripheral nervous system is every other part of the nervous system

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15
Q

How is an impulse transmitted between two neurones

A
  • The impulse reaches the end of one neurone
  • A neurotransmitter is released and it diffuses across the gap
  • A new impulse is triggered in the next neurone
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16
Q

What type of neurone connects a receptor to the Central nervous system

A

A sensory neurone

17
Q

What type of neurone connects the Central nervous system to an effector

A

A motor neurone

18
Q

Describe the reflex arc

A

Stimulus detected by a receptor

impulse passed along sensory neurone to Central nervous system

impulse passed along motor neurone to effector

effector brings about the response