respiratory substrates

respiratory substrates definition

any biological molecule that can be broken down in respiration to release energy

main respiratory substrate

glucose

other respiratory substrates

carbohydrates, lipids and proteins

choice of respiration

1st = carbs, 2nd = lipids, 3rd = proteins

why does more hydrogen per unit mean more ATP?

in theory more reduced NAD and FAD can be produced so more ATP can be made in oxidative phosphorylation

RQ meaning

respiratory quotient

respiratory quotient meaning

ratio of carbon dioxide molecules produced to oxygen molecules taken in during respiration

RQ of carbs

1\.0

RQ of lipids

0\.7

RQ of proteins

0\.9

RQ anaerobic respiration

RQ>1