BIO 242 Lecture Notes - Lecture 13: Receptive Field, Osmotic Concentration, Prostaglandin
19 Oct 2016
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Document Summary
Proprioception- included info from visceral organs, skin, joints. Receptors- change/transduce one kind of energy into electrical impulses in a form of action potential. Frequency of action potential- for example: the hotter the surface/item, the more action potentials occur. Number of receptors activated- for example, the hotter the surface/item, the more receptors are activated. Perception- we can only perceive the world with the receptors we have. Adequate stimuli-normal stimuli (modality) that normally stimulates it. Law of specific nerve energies- given sensory receptor is specific for a particular energy from or stimulus type. Photoreceptors- found in the retina, stimulated by light. Baroreceptors- stimulated by pressure, response to blood pressure. Osmoreceptors- monitor osmolarity of ecf, refers to the number of soluble particles. Tonic- respond to stimuli by firing as long as stimulus is applied. Phasic- will respond to stimuli when first applied then adapt decrease stimuli. Pain receptors do not adapt- actually a good thing.
