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Glucose (Diffusion ((usually )FACILITATED DIFFUSION (glucose follows its…
Glucose
Diffusion
CAN'T diffuse across cell membrane
isnt nonpolar
(usually )FACILITATED DIFFUSION
non-ATP powered membrane protein transporter
glucose follows its concentration gradient into cell
cell constantly uses glucose, therefore concentration gradient is creating pull into cell
Ex: GLUT membrane bound transport enzymes
GLUT-2 found on cell membrane of Hepatocyptes
(sometimes) ACTIVE TRANSPORT
against the concentration gradient, in certain tissues of body
secondary active transporter, specifically SGLT (sodium glucose linked transporter)- normally
in kidneys and small intestines, places where absorption has to go against concentration gradient b/c place of concentrated levels of glucose, but all of it needs to be absorped
concentration gradient created by Na-K pump charges the concentration gradient that allows the SGLT to actively transport glucose w/ sodium
Structure
hydrophilic
Polar
Use
Generally speaking: powers cellular activity through providing ATP
1 Glucose enters cells
2 Glucose converted into glucoe-6-phosphate (G6P) by hexokinase or glucokinase
3 G6P goes through glycolysis, produces pyruvate, pyruvic acid
4 w/ oxygen available, pyruvate converted to Acetyl CoA for Krebs Cycle