3.4 food as fuel Flashcards
what do gasoline and glucose have in common
abundance of CH bonds
large amounts of PE
when electron moves closer to nucleus:
energy is released
when electron moves farther away from nucleus
energy is absorbed
how is energy released
as electrons in CH bonds are pulled towards larger more electronegative nuclei, energy is released as the electrons move to a lower energy level
oxidation
atom/molecule loses electron to another atom
reduction
atom/molecule gains electron from another atom
as e- are exchanged, they may be shared in __________ which results in the _________________
different arrangements,
release of nrg
true or false: reactions in the body need to be controlled and undergo a number of different steps
true
what helps controlled oxidation occur? what is the result
enzymes - they catalyze each of the steps needed
the result is a series of controlled oxidation reaction with energy stored at each step
how is the energy absorbed from controlled oxidation reactions
absorbed by energy carrier molecules and used to either
1) power other reactions
2) make ATP
what are energy carrier molecules
molecules that help store the energy released by reactions
Dehydrogenases
help remove
hydrogen atoms and transfer electrons
reduction of NAD+
NAD+ + 2e- + H+ = NADH
what is NADH used for
used to power ATP synthesis
