ANP 1105 Lecture Notes - Lecture 4: Motor System, Cerebellum, Vasopressin

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

Document Summary

Dynamic state of eqm maintained by all organ systems. Mostly nervous (use neural electrical impulses) + endocrine (use bloodborne hormones) Variables changing factors (blood sugar, body temp, blood volume, etc. ) Determines set point @ which variable maintained. Receives output from control center (mostly cns) Response reduces (neg) or enhances (pos) stimulus. Stimulus receptor input output response. Output: info sent along efferent pathway to effector. Response: effector feeds back to reduce effect of stimulus + return variable to. Input: info sent along afferent pathway to control center homeostatic level. Reduces or shuts off original stimulus, variable changes in opposite direction. Heat temp rises temp-sensitive cells in skin + brain hypothalamus sweat glands evaporation of sweat, body temp falls. Cold temp falls temp-sensitive cells in skin + brain hypothalamus skeletal muscles shivering, temp rises. Blood sugar rises receptors sense change pancreas (control center) secretes insulin into blood prompts body cells to absorb more glucose, remove from bloodstream blood sugar falls.