ANP 1105 Lecture 1: All ANP notes

• School: University of Ottawa
• Department: Anatomy and Physiology
• Course: ANP 1105
• Professor: Jacqueline Carnegie

Document Summary

Input (information sent along afferent pathway to control center) . Output (information sent along efferent pathway to effector . Response (effector feeds back to reduce stimulus effect & returns variable to homeostatic level) Negative feedback: reduce or shut off original stimulus ie. regulation of blood volume via adh reduce or shut off original stimulus ie. regulation of blood volume via adh ie. regulation of body temperature. Homeostatic imbalances increase risk of disease, and cause changes associated with aging. Most diseases are seen as a disturbance of homeostasis. Aging associated w progressive decrease in our ability to maintain homeostasis (greater risk for illness) Somatic nervous system vs autonomic nervous system (both part of motor efferent division of pns) Somatic: single neuron from cns to effector groups axon is heavily myelinated. Skeletal muscles are the effector organs effect is stimulatory. Parasympathetic: two neuron chain from cns to effector organs lightly myelinated preganglionic axon ach non myelinated postganglionic axon.