metabolism catabolism anabolism
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Catabolism Anabolism
Metabolism
First Law of ThermodynamicsEating
Where does the energy come from?
Where does it go?
First Law of Thermodynamics
Walking up a hillWhere does the
energy come from?Where does it go?
Sledding down a hillWhere does the
energy come from?Where does it go?
Has energy been created or destroyed?
First law of thermodynamicsEnergy cannot be created or destroyed
Second law of thermodynamicsEnergy transfer is not completely efficient,
therefore…Every energy transfer or transformation
increases the entropy of the universeEntropy – Disorder or randomness
Second law of thermodynamicsNeed energy to
decrease entropyEx. Cleaning your
roomDo not need
energy to increase entropy (Spontaneously)Ex. Your room gets
messy without work
Energy and reactionsEnergy – the
capacity to do workWork = force x
distance moved
Energy and reactionsWhat is the unit on
the y axis? Energy (Gibbs free
energy)Which graph
represents more capacity to do work?
Energy and Reactions
Exergonic and Endergonic reactions
Why is this important?The cells use exergonic processes to drive
endergonic processes.This is called energy coupling
Think of a real life example of a primary action
that stores potential energy for a secondary action. (ex: pumping water into a holding tank then allowing it to flow through a turbine when electricity is needed)
ATP!!!!ATP couples
reactions within the cell
What do you think regenerates ATP?
Catabolism!!!! (cellular respiration)
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