Respiration Flashcards
what is cellular respiration?
the chemical reactions in cells that break down nutrient molecules to release energy
what nutrient is used for respiration?
often glucose (in animals from food, in plants
from photosynthesis)
points on respiration
- involves enzymes
- carried out in ALL cells
- energy released as ATP
Energy needed in the human body for:
- muscle contraction
- protein synthesis
- cell division
- active transport
- growth
- passage of nerve impulses
- maintenance of constant body temperature
what is Aerobic respiration?
the chemical reactions in cells that use oxygen to break down nutrient molecules to release energy
points on aerobic respiration
- releases large amount of energy
- most reactions take place in mitochondria (in eukaryotes)
- happens all the time
what is the equation for aerobic respiration?
glucose + oxygen > carbon dioxide + water
C6H12O6 + 6O2 > 6CO2 + 6H2O
what is Anaerobic respiration?
the chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
what releases more energy? aerobic or anaerobic respiration
aerobic
where does anaerobic respiration happen?
a) in yeast (fermentation) used in brewing and bread making
b) in muscles during vigorous exercise muscles respire anaerobically because oxygen cannot be delivered fast enough
what are the products in yeast after anaerobic respiration
glucose > ethanol + carbon dioxide
C6H12O6 > 2C2H5OH + 2CO2
what are the products in humans after anaerobic respiration
glucose > lactic acid
what is a respirometer
a devise to measure the rate of respiration
