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21 Cards in this Set
- Front
- Back
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There are 2 types of thermoreceptors: warm and cold. What type of Axon is each? Which is more dense?
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COOl more dense, which are Ad fibers, and WARM are less dense and have C-fibers
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What are the 2 types of C-fibers for WARM? what are theycalled?
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Vanilloid fibers, TRPV 1/2 - for noxious heat and TRPV 3/4 for warmth
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What are the 2 types of Ad fibers for COOL?
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TRPM8 for cool
TRPA1 - for noxious cold |
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Pathway for Thermoreceptors:
Cell body is in _1__, synapses in __2__ of spinal cord, then crossing midline and going through __3__ to the ___4__. This then sends a 3 neuron to __5__ |
1 - Dorsal root ganglion
2 - dorsal horn 3 - spinothalamic tract 4 - VPL nucleus 5 - S1 |
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Trigeminal thermoreceptors
First neuron goes ___1___ into __2__. This sends a 2 neuron, the ___3___ across the midline to the __4__ |
1 - down spinal tract
2 - spinal nucleus (nucleus caudalis) 3 - trigemino thalamic 4 - VPM of thalamus |
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What part of the brain works to maintain the body's set point?
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Anterior hypothalamus
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How does shivering achieve heat generation?
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increases o2 intake, and with spindles creates cyclical shiver
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What 2 things aid in fever?
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WBCs and Pyrogens
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What are the efferent axons used in cooling mechanisms?
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CHOLINERGIC SYMPATHETIC AXONS
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What muscles are involved in focusing of vision?
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CILIARY
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What 3 things influence vision for perception of distance?
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Size of image on retina
Stereopsis - image on the 2 retinas is different Moving parallax - faster if closer |
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For the 3 cones
R B G what are the prefixes associated? What are the lengths? |
R - Long, Prot
B - Tri, short G - Deut, Medium |
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What is MYOSIS? what is it done by?
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Pupillary constriction, by iris sphincter
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What is Mydriasis?
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Puillary relaxation, by iris radial muscle
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What is the word for a color weakness?
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Anomaly
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What is the word for the blindness to a color?
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Anopia
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What is the word for someone with normal vision?
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emmetopia
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what is the word for someone with all 3 cones but 1 may be weak
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trichomat
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what is the word for someone with 2 cones
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dichromat
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What is the word for someone with only 1 cone
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monochromat
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What part of hte cortex does vision relay to?
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Lateral geniculate body
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