PHGY 214 Lecture Notes - Lecture 2: Pseudounipolar Neuron, Oligodendrocyte, Procaine
8 Dec 2017
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Made of two components: plasma: fluid part of blood. Homeokenisis: organism will achieve equilibrium via dynamic processes, initiates change. Homeostasis: responds to change, ability to regulate organisms internal conditions. Changes reg by multiple dynamic equil adjustments. 37degrees is set point, sensor (thermoreceptor) detects drop in temp, intregator compares this to the norm and starts effector (shiver, vasoconstriction) to keep 37 temp. Extrinsic: initiated outside an organ to alter activity of organ, controlled by endocrine and nervous sys. Hormones change w day, month and age. High bp is not regulated, set point can vary. High or low weight set point can vary. Order: stand up quick bp falls cardiovascular response bp restored. Disorder: bacterial infection bacterial toxins thermogenesis fever. Express 30% of genome vs 10% in other cells. Pseudo-unipolar: dendrites and axon on both sides of cell body code and comm electrically, send signal away from cell body to neurons, muscles or glands.
