energy concentrated in wood dispersed as heat dispersed as light dispersed as ashes lecture 8 -...
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Energy concentrated in wood
Dispersed as heat
Dispersed as light
Dispersed as ashes
Lecture 8 - Respiration
Energy dispersed as heat and light
glucose
Energy = heat & light
Stop iiiiiiTT!
glucose
RespirationBurning
Energy = heat & ATP
Metabolism – all chemical reactions in cell
Catabolism – breakdown of large to smaller molecules
Anabolism – synthesis of larger molecules from smaller molecules
Anabolism Catabolism
Monomers
Polymer
From Saunders Publ.
Cell has a constant need for energy (ATP)
From Saunders College Publishing
High energy bond used to do work in cells
A-P~P~P = ATP
Adenosine triphosphate = ATP
Average adult human produces and utilizes her/his own body weight of ATP per day.
Price of ATP from Sigma Chemical Company is $20.00 per gram
For 70 kg (131) individual it would cost $1,400,000 to purchase that amount of ATP for one day’s worth of ATP
Cell has 1 second supply of ATP
10,000,000 ATPs used and made per second per cell
Cellular Respiration (Aerobic breakdown of glucose)
Glucose, C6H12O6 + O2
CO2 + H2O + 36 (net) ATPs + Heat
Respiration releases energy in chemical bonds in glucose
Enough energy for 36 ATPs
Glucose
Now what??
A-P~P~P
Breaking of the 3rd bond will liberate energy to do work in cells
Energy
Respiration occurs in the mitochondrionReview
Oxidation and ReductionA. Oxidation – chemical reactions that give up electronsB. Reduction – chemical reactions that accept electrons
Oxidation and Reduction
Oxidation –
chemical reactions that give up electrons
Reduction –
chemical reactions that accept electrons
NaNa+
e-
Cl
Cl-
oxidized
reduced
(sodium)
(chloride)
Let me at him
Oxidation and Reduction
Heat
90oC80oC
70oC
60oC
50oC
Review
100oC
(-) 4(-)
4H+
O2 4(-)+O24-
2H2O
+
Electron Transport System = Oxidation and
Reduction
Heat
ATP
4 H atoms (from glucose) = 4 (+) and 4 (-)“Hot”
“cool”
Heat
90oC80oC
70oC
60oC
50oC
Review
100oC
Lactic Acid
Ethanol and CO2
w/o O2
In muscles
Fermentation in yeast
+ O2
Aerobic metabolism 36 ATPs
Glucose
Anaerobic metabolism – 2 ATPs
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