The nervous system - B1d

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  • Created by: iram_f
  • Created on: 12-10-14 16:44
What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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How are neurones adapted to carry a nerve impulse?
They have elongated axons to make connections from one part of the body to another, an insulating myelin sheath to speed up the nerve impulse and protect it as well as dendrites (branched endings) to allow a single neurone to act on many muscles.
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What is a reflex arc?
A reflex arc is the pathway a message takes, going from the stimulus, receptor, sensory neurone, relay neurone, motor neurone, effector to the response. A reflex action is done without conscious thought as it bypasses the brain.
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What is binocular and monocular vision and its benefits?
Binocular vision is when eyes are close together, giving a limited field of view yet an accurate judgement of distance & speed. Monocular vision is when eyes are on either sides of the head, giving a wide field of view yet bad judgement of distance.
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What is the pathway does light take in the eyeball?
It
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is accommodation?
Accommodation is the
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, contracting
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object a
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
14 of 34
What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object and
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense (ra when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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What are the vision defects of long and short-sight and how can they be corrected?
Long sight is when
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
21 of 34
What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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What are the vision defects of long and short-sight and how can they be corrected?
Long sight is when the eyeball is too short so the focal point of light falls beyond the retina
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
24 of 34
What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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What are the vision defects of long and short-sight and how can they be corrected?
Long sight is when the eyeball is too short so the focal point of light falls beyond the retina - it can be corrected by a convex lens. Short sight is when the eyeball is too long so the focal point of light falls short of the retina, and it ca
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
27 of 34
What is accommodation?
Accommodation is how the ciliary muscles change the shape of the lens, which is short and dense when the muscles contract to focus on a near object. The lens is long and thin when the ciliary muscles relax to focus on a distant object.
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What are the vision defects of long and short-sight and how can they be corrected?
Long sight is when the eyeball is too short so the focal point falls beyond the retina - it is corrected by a convex lens. Short sight is when the eyeball is too long so the focal point falls short of the retina, corected by a conc
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What occurs at a synapse?
At the gap between neurones (a synapse) impulses trigger neurotransmitters to be released to bind with receptors in the next neurone, causing the impulse to carry on being transferred.
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What is the pathway does light take in the eyeball?
It is first refracted by the cornea, and then the lens focuses light on the retina so the rays converge and produce a clear image on your retina.
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What are the vision defects of long and short-sight and how can they be corrected?
Long sight is when the eyeball is too short so the focal point falls beyond the retina - it is corrected by a convex lens. Short sight is when the eyeball is too long so the focal point falls short of the retina, corrected by a concave lens.
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What is accommodation?
farts
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What occurs at a synapse?
At the gap between neurones (a synapse) neurotransmitters
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Card 2

Front

How are neurones adapted to carry a nerve impulse?

Back

They have elongated axons to make connections from one part of the body to another, an insulating myelin sheath to speed up the nerve impulse and protect it as well as dendrites (branched endings) to allow a single neurone to act on many muscles.

Card 3

Front

What is a reflex arc?

Back

Preview of the front of card 3

Card 4

Front

What is binocular and monocular vision and its benefits?

Back

Preview of the front of card 4

Card 5

Front

What is the pathway does light take in the eyeball?

Back

Preview of the front of card 5
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