BIOC32H3 Study Guide - Final Guide: Thalamus, Parathyroid Gland, Plat

• School: UTSC
• Department: Biological Sciences
• Course: BIOC32H3
• Professor: Joanne Nash

Document Summary

Activated by stimulus (physical e) sensory receptor activated ap to cns integration in cns. 3 types of se(cid:374)so(cid:396)y r"s: unmyelinated; free nerve endings, myelinated; encapsulated in connective tissue, myelinated; 2 different cells (receptor synapses onto neuron) Ho(cid:449)e(cid:448)e(cid:396), r"s (cid:272)a(cid:374) (cid:396)espo(cid:374)d to othe(cid:396) fo(cid:396)(cid:373)s if i(cid:374)te(cid:374)sity is high e(cid:374)ough (cid:894)i. e. photo(cid:396)e(cid:272)epto(cid:396)s pressure) Labelled line coding: once a specific pathway is activated, you will always get a specific response, regardless of the stimulus. Adequate stimulus: form of energy that a receptor is most sensitive too (i. e. photoreceptors pain) Somatic and visual se(cid:374)so(cid:396)y (cid:374)eu(cid:396)o(cid:374)s ha(cid:448)e rf"s (cid:449)hi(cid:272)h converge onto secondary neurons (more convergence = less discrimination/accuracy) Ea(cid:396)s ha(cid:448)e no rf"s; they use timing to locate sound source. Lateral inhibition; i(cid:374)(cid:272)(cid:396)eases (cid:272)o(cid:374)t(cid:396)ast (cid:271)et(cid:449)ee(cid:374) a(cid:272)ti(cid:448)ated rf"s ad i(cid:374)a(cid:272)ti(cid:448)e (cid:374)eigh(cid:271)ou(cid:396)s (cid:894)i(cid:374)(cid:272)(cid:396)eases dis(cid:272)(cid:396)i(cid:373)i(cid:374)atio(cid:374)/accuracy) 4 properties of stimuli: modality (form of stimulation; using diffe(cid:396)e(cid:374)t types of r"s, location (cid:894)usi(cid:374)g rf"s o(cid:396) ti(cid:373)i(cid:374)g fo(cid:396) ea(cid:396)s(cid:895, duration (proportional to stimulus duration)