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14 Cards in this Set
- Front
- Back
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Sensation |
The conscious perception of stimuli |
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Sensory Receptors process |
respond to environmental stimuli nerve impulses travel to the brain's cerebral cortex sensation of stimuli occurs decrease in stimulus perception can occur with receptive stimuli |
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Exteroceptors |
detect stimuli from outside the body |
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Interoceptors |
receive stimuli from inside the body (homeostasis) |
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Chemoreceptors |
respond to nearby chemicals- taste, smell, pH etc. |
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Pain Receptors |
a type of chemoreceptor that responds to chemical released by damaged tissue |
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Photoreceptors |
responds to light energy |
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Mechanoreceptors |
responds to mechanical forces such as pressure- sounds position touch |
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Thermoreceptor |
Stimulated by.... |
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Function involved in knee jerk reflex |
proprioceptors called spindle cells inside muscles monitor muscle length to maintain posture When suddenly stretched spinal cells fire action potentials to spinal cord interneurons cause them to sen action potential back down motor neurons causing contraction of muscle fibers to decrease muscle length and return it to its original length |
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anatomy and function of the eye |
Layers 3: Sclera, Choroid, Retina Ciliary Body Iris Pupil Comea |
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Rods |
contain visual pigment Rhodopsin, made of opsin retinal |
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Cones |
Also contains Rhodopsin but 3 different kinds of cones conian red green and blue pigment each sensitive to different wavelength (colors) of light |
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Lens |
flexible, transparent structure that accommodates to focus light on the retina to form an inverted image |
