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Human Bio- Unit 1 > Respiration > Flashcards

Flashcards in Respiration Deck (15):

What is cellular respiration?

Series of chemical reactions resulting in the release of the chemical energy from energy rich molecules. To generate ATP


What is respiration fundamental to all living cells?

Without respiration they would not be able to release the energy contained in food molecules into a usable form.


How is energy transferred by means of ATP?

It acts as a link between catabolic and anabolic reactions.


What is Gylcolysis?

The breakdown of glucose into 2x 3carbon pyruvate with a net gain of 2ATP.


How must glucose be altered to allow it to take part in the reaction?

It must be phosphorylated, by enabling the glucose to initiate the chemical reaction.


What else is released during the energy payoff stage?

Hydrogen ions catalysed by dehydrogenase.


Where does the Citric Acid Cycle take place?

In the fluid filled inner space of the mitochondria called the matrix.


What is pyruvate broken down into?

Acetyl 2C which then joins with coenzyme A to become acetyl coenzyme A


What is eventually regenerated from the citrate?



What is generated from the Citric Acid Cycle?

Hydrogen ions, carbon dioxide gas and ATP.


What is the electron transport chain?

When NADH and FADH are catalysed by dehydrogenase and are passed through cytochromes with the help of high energy electrons to be re passed through ATP synthase to form ATP.


What else is generated in the electron transport chain?

Water from excess hydrogen ions and oxygen.


What other sugars can be converted to glucose or to intermediates in the respiratory pathway?

Fructose, sugar and maltose


Into what compounds is a molecule of fat broken down by digestive enzymes?

Fattyy acids and glycerol.


What must happen to amino acids before these can enter the respiratory pathway?

Have to go through deanimation.