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cellular respiration occurs in

the mitochondria of cells

cellular respiration process

sugar (glucose) is converted to ATP
glucose+O2+ADP = ATP+CO2+H2O
(ADP is "recharged" into ATP)


ATP: triple P
ADP: double P

3 types of food molecules

Protein, Fat, Carbohydrates


chains of amino acids;
only amino acids are small enough to pass through the digestive tract and into the body


glycerol bonded to 3 fatty acids, high energy, must be broken down into the glycerol before absorption


individual/chains of simple sugar units


simple sugars joined together, found in plants


blood sugar


cannot be broken down in the human body

digestive system

mouth, pharynx (throat), esophagus, stomach, small/large intestine, rectum

most of digestion occurs in

the small intestine

when do food molecules enter the circulatory system?

after passing through the liver








binge eating, then ridding the body of food

why eating disorders are deadly

no energy for cellular respiration, proteins cannot be produced, heart shrinks

why does the body have so many parts and accessory glands?

because different food molecules require different breakdown steps

zyklon B

blocks cellular respiration and denies brain cells ATP

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