ANP 1105 Lecture Notes - Lecture 9: Postganglionic Nerve Fibers, Autonomic Nervous System, Motor Neuron

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Joanne Savory

Document Summary

Anp1105 a dr. joanne savory and dr. m zeroual. Homeostasis: control mechanisms & ans (ch 1 and 14) Homeostasis: (cid:271)ody(cid:859)s a(cid:271)ility to (cid:373)ai(cid:374)tai(cid:374) sta(cid:271)le i(cid:374)te(cid:396)(cid:374)al (cid:272)o(cid:374)ditio(cid:374)s (cid:894)dy(cid:374)a(cid:373)i(cid:272) e(cid:395)uili(cid:271)(cid:396)iu(cid:373)(cid:895) (cid:449)ith continuously changing conditions of the external environment i. e temperature regulation with sweat, ; blood ion concentration control. Receptor: senses monitor environment and respond to changes (stimuli) and send info (input) to the control center along the afferent pathway. Control center: determines set point the level to which the variable is to be maintained; analyzes the input and determines correct response; output info is then sent to the effect along efferent pathway. Effector: provides means for response to the stimulus; results of response are feedback to influence the effect of the stimulus (-ve or +ve) Homeostatic imbalance: most disease is a disturbance of homeostasis. Aging associated with progressive decrease in our ability to maintain homeostasis, thus older = greater risk for illness.