anaerobic and aerobic respiration and metabolism

respiration

the release of energy from sugar molecules such as glucose

exothermic reaction

how organisms use energy from respiration

-to build larger molecules from smaller ones i.e amino acids—>proteins

-for muscular contraction

-maintaining body temp

aerobic respiration

takes place whenever there is enough oxygen

most efficient

continuous in plants and animals

where does aerobic respiration occur in cells

mitochondria

word and chemical equation for respiration

glucose+oxygen—>water+Carbon dioxide

C6H12O6+O2—>H2O+CO2

anaerobic respiration

without oxygen

only when we really have to i.e sprinting-cants get enough oxygen to tissues under demand of exercise

equation for anaerobic respiration in humans

glucose—>lactic acid

why do we prefer not to use anaerobic respiration

-glucose is only partially broken down so not using all energy from molecule

-releases lactic acid which is toxic so has be removed from body

equation for anaerobic respiration in plants and yeast

glucose—>ethanol+carbon dioxide

what do we call anaerobic respiration in yeast

fermentation

how do we use fermentation yeast

-use yeast in bread so co2 produced produces pockets making bread appear light and fluffy

-use ethanolm in beer in wine

metabolism

the combination of all chemical reactions in an organism

I.e glucose combined to make starch, glycogen and cellulose

Respiration

Fatty acids built up to make lipids

Breakdown of excess proteins into urea