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5 Cards in this Set
- Front
- Back
Touch
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1. Meissner's Corpuscle: distributed through the skin and under epidermas
2. Pacinian Corpuscle: deep pressure and detects pressure changes and vibrations 3. Merkel Discs: touch receptors and located deep in dermis |
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Pressure
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-lasts longer than touch
-felt over larger area -pacinian corpuscles respond when pressure is applied to skin |
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Temperature
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2 types of specialzed free nerve endings:
a. hot b. cold -thermorecptrs adapt rapidly to change (hot tub) |
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Pain
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-free nerve endings and are found in every tissue in body
-activates enzymes that form a chemcial called "Bradykinin" |
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Vision
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-wall consists of 3 layers
a. sclera b. comea c. choroid -lens changes shape to view objects at varying distances -lens attached to a muscle by ligaments -no rods in fovea -diameter is smaller when contracts, loosens tension and focuses on close objects -diameter increases when it's relaxed |