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Biology > Irritability > Flashcards

Irritability Flashcards

1
Q

Define stimulus

A

A change in the environment that an organism responds to

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2
Q

Define response

A

A change in the organism brought about by the stimulus

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3
Q

Define receptor

A

A specialized cell that receives stimuli

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4
Q

Define effector

A

The part of the organism that responds to the stimulus

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5
Q

Define irritability

A

The ability to detect and respond to stimuli

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6
Q

What is irritability necessary for?

A
  1. mating
  2. Finding food
  3. Moving away from hot to cold temperatures
  4. Protecting the body from damage
  5. Survival
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7
Q

Function of the conjunctiva

A

Protects the cornea

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8
Q

Function of the cornea

A

Refracts light rays onto the retina

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9
Q

Function of pupil

A

Allows light to enter the eyeball

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10
Q

Function of the iris

A

Controls the amount of light entering the eye

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11
Q

Function of sclera

A

Protects the eyeball

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12
Q

Function of optical nerve

A

Carries impulses from the retina to the brain

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13
Q

Explain short sightedness

A

They can see near objects, but not far objects
Light rays from near objects focus on the retina; light rays from distant objects focus in front of the retina

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14
Q

How is short-sightedness corrected

A

By wearing concave lenses as spectacles or constant lenses

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15
Q

Explain short-sightedness

A

Light rays from near objects focus on the retina
Light rays from distant objects focus in front of the retina.

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16
Q

How is short-sightedness corrected

A

By wearing concave lenses as spectacles

17
Q

Explain long-sightedness

A

Light rays from near objects focus behind the retina. Light rays from distant objects focus on the retina

18
Q

How is long-sightedness corrected

A

By wearing convex lenses as spectacles

19
Q

How is glaucoma treated

A

With eye drops or laser treatment

Biology (17 decks)

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