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BIOL 5600 Notes 1/13/16

by: LaurenC

BIOL 5600 Notes 1/13/16 BIOL 5600

Marketplace > Auburn University > Biology > BIOL 5600 > BIOL 5600 Notes 1 13 16
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About this Document

These are notes on the material covered in lecture on the date in the title.
Biomedical physiology
Dr. Mendonća
Class Notes
Biology, Biomedical Physiology, Physiology, Biomedical Sciences




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This 4 page Class Notes was uploaded by LaurenC on Sunday January 17, 2016. The Class Notes belongs to BIOL 5600 at Auburn University taught by Dr. Mendonća in Winter 2016. Since its upload, it has received 169 views. For similar materials see Biomedical physiology in Biology at Auburn University.


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Date Created: 01/17/16
Biomedical Physiology 1/13/16 Anatomy -The study of body structures - Morphology Physiology -The study of body function Function -Whatever process that is required to sustain life Six life processes 1) Metabolism -Sum of all chemical processes in the body a) Catabolism -The breakdown of larger to smaller molecules b) Anabolism -Building of smaller to larger molecules c) Energy Production 2) Growth -Cell proliferation 3) Movement -Motion of the whole body at different levels a) Respiration -Movement of gasses, solutes, and solvents -Transport 4) Responsiveness -The ability to sense changes in the external and internal environment, and elicit a responses o Integrative systems a) Nervous system b) Endocrine system 5) Differentiation -Specialization of cells 6) Reproduction -Sometimes not included  The 6 life processes are tightly regulated. Managed based on a mean set point. Varying most of the time only slightly, and sometimes more than slightly, from that set point based on the conditions and margins that have been defined. The purpose of physiology -The action of maintaining the vital life processes in a functioning manner at their set point Bernard -One of the first to know that our bodies want to maintain a relative constant internal environment, even though the external environment in constantly changing. -Coined the term milieu interieur Walter Cannon -Same idea as Bernard -Coined the term homeostasis Homeostasis - The condition of equilibrium in the body’s internal environment “produced by the ceaseless interplay o fall the body’s regulatory functions”. o The conditions are always changing in order to maintain the set point o Dynamic condition o Focuses on what regulates boundaries o Concentrates on the inside o Always changing o What is the stress point? o What controls the boundaries? Allostasis -Updated term for homeostasis o What is going on outside o How to regulate the external conditions o What defines the set point  How do we maintain? -Through feedback systems Feedback systems - A cycle of events in which the status of the body condition is continuously monitored, evaluated, changed, remonetized, reevaluated, etc. Three basic components of feedback systems 1) Receptor -Input -Monitors changes and sends data to control center 2) Control center -Integration -Sets the range of accepted values -Evaluates inputted data -Generates output demands 3) Effector -Carries out command -Responds -Changes parameter that needs to be monitored -Nearly every organ/ tissue can be an effector  This entire cycle forms a feedback loop which is almost always negative (reverses parameter) Ex. of negative feedback: Decrease of heart rate Heart rate is too high> BP is too high> baroreceptors increase> input to brain> brain inhibits heart rate> heart rate decreases -Positive feedback would not help here  An example of positive feedback would be labor or blood clots Ex. of positive feedback: labor 1 contraction> stretch receptors> brain activity increases> oxytocin levels increase> contractions increase


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