Transcript
Which type of receptor detects touch?
Mechanoreceptor
Thermoreceptor
Pain receptor
Chemoreceptor
Which type of receptor detects touch?
Mechanoreceptor
Peripheral mechanoreceptors are stimulated by pressure on any part of the skin. Slight pressure activates receptors that cause a sensation of a light touch, while increased pressure activates sensors that cause the brain to register some level of pressure and possibly pain.
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True or false? We have taste receptors for four separate sensations.
True
False
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True or false? We have taste receptors for four separate sensations.
False
Our standard taste receptors on the tongue include the sensations of sweet, sour, salty, and bitter. A fifth receptor, umami, has been recently accepted by scientists. Another receptor, oleogustus (fat), is currently being debated.
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True or false? Cheese tastes like paper when we have a cold or a stuffy nose.
True
False
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True or false? Cheese tastes like paper when we have a cold or a stuffy nose.
True
Our brain integrates impulses from both our taste buds and olfactory mucosa to determine most tastes. A stuffy nose eliminates smell as a factor.
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True or false? The middle ear is filled with air.
True
False
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True or false? The middle ear is filled with air.
True
The middle ear is usually filled with air, which allows the three small bones to vibrate freely.
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True or false? The inner ear functions primarily in sensing sound.
True
False
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True or false? The inner ear functions primarily in sensing sound.
False
The inner ear functions equally in sensing sound, body movement, and direction.
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What colors do we actually “see”?
Purple, green, and yellow
Red, orange, and blue
Red, green, and blue
Purple, orange, and yellow
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What colors do we actually “see”?
Red, green, and blue
We have three types of cones: red, green, and blue. The brain integrates impulses from these to produce all the colors we see.
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Glaucoma is caused by _____.
a detached retina
a lens becoming opaque
an increase in the pressure exerted by the aqueous humor
the loss of cilia in the detection system
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Glaucoma is caused by _____.
an increase in the pressure exerted by the aqueous humor
This increases the pressure inside the eye and compresses blood vessels supplying the retina, which may cause the retinal cells, or optic nerve cells, to degenerate and lead to blindness.
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