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Human Biology > Sensory System Chapter 1 > Flashcards

Sensory System Chapter 1 Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

A ______________ is able to convert a signal from the environment, called a stimulus, into a nerve impulse. This signal is transmitted to the CNS for integration

A

Sensory receptor

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2
Q

Type of sensory receptor that responds to chemical substances
Taste, smell

A

Chemoreceptors

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3
Q

Type of sensory receptors that respond to light energy
Seeing color

A

Photoreceptor

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4
Q

Type of sensory receptor that is stimulated by forces, pressure
Hearing, touch

A

mechanoreceptors

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5
Q

Type of sensory receptor that is stimulated by temperature changes
Touch (skin)

A

Thermoreceptors

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6
Q

Absorbs stray light, extensive blood supply

A

Chorioid

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7
Q

Contains mostly cones for acute vision

A

Fovea

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8
Q

Contains photoreceptors for sight, located at the back of the eye

A

Retina

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9
Q

Protects and supports the eye, white outer layer of the eye

A

Scelera

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10
Q

Admits light into the eye, hole in the center of the eye

A

Pupil

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11
Q

Transmit light rays and support the eye, located in front of and behind lens

A

Humors

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12
Q

Refracts light rays, window of the eye

A

Cornea

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13
Q

Regulates light entrance into the eye, regulates size of pupil

A

Iris

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14
Q

Refracts and focuses light rays, divides the eye into compartments

A

Lens

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15
Q

Transmits impulses to the visual cortex

A

Optic Nerve

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16
Q

The photoreceptors
Rods contain _____
Cones contain_______

A

rhodospin
Photopin

17
Q

disks that contain visual pigments
membrane of each disk contains Rhodopsin (when it absorbs light energy splits and releases retinal causing plasma membrane to close so nerve signals go to the brain) which has a deep purple pigment

A

Rods

18
Q

Located in fovea and activated by bright light that helps us detect fine detail and color

A

Cones

19
Q

3 layers of neuron
Inner layer of the eye
Rod and cone cells are at the back of it
As signals pass to bipolar cells and ganglian cells, integration occurs

A

Retna

20
Q

Shows no rods and cones where optic nerves exit the retina
No vission possible in this area
In different spot in eye so you have complete vision

A

Blind spot

21
Q

Lens of eye is cloudy
less light reaches retina causing vision loss

A

cataract

22
Q

Build up of fluid pressure inside eye may lead to decreases in vision or blindness

A

Glaucoma

23
Q

Uneven cornea means that the rays do not focus evenly
Uneven lens allows subject to see objects clearly

A

Astigmatism

24
Q

Long eye; rays focus in front of retina when viewing distant objects
Concave lens allows subject to see distant objects

A

nearsighted

25
Q

Short eye; rays focus behind retina when viewing close objects
Convex lens allows subject to see close objects

A

farsighted

Human Biology (26 decks)

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