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Physiology

Test 1

QuestionAnswer
Metabolism sum of all physical and chemical reactions occurring within a living system
1st law of thermodynamics energy cannot be created or destroyed
2nd law of thermodynamics all things tend towards disorder
Enzyme characteristics -specificity -competition -saturation
allosteric binding noncompetitive binding: cofactor binds
NAD coenzyme from niacin -transports electrons in oxidation-reduction reactions -helps to transport electrons within mitochondria
solvent greatest quantity in a solution
solute dissolved, lowest quantity, polar
gradient change in the value of a quantity with change in a given variable -temp -pressure -concentration
potential measure of a difference from one point to another with a driving force
Passive transport categories -simple diffusion -osmosis -facilitated diffusion
diffusion net movement of molecules from a region of high concentration to region of lower concentration towards equilibrium
factors that influence diffusion -temperature -pressure -molecular size -concentration -permeability -type of solvent -distance to diffuse
passive membrane transport -pores -gate channels lingand gated: key opens mechanically gated: physical force voltage gated: electrical signal -facilitated transported: bind to then moved to other side, lower saturation
characteristics of protein transporters/ enzymes -specificity -competition -saturation
Osmosis net movement of water from a region of low solute concentration to a region of high solute concentration across a selectively permeable membrane towards equalibrium
osmotic pressure measure of the tendency for a solution to gain water by osmosis when separated by a membrane from pure water. directly related to the osmolarity of the solution
Created by: brit24
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