Biology: Cell Respiration Flashcards
aerobic respiration: whole organism=
gasses exchanged with the environment
why does the respiratory surface have to be moist
gases must be dissolved in water before they can diffuse in or out
how does aerobic respiration work with a uni cellular aquatic protozoan
O2 passes across the cell membrane by diffusion and CO2 exits
How does aerobic respiration work in fish
the O2 in H2O diffuses across the surface of gills into capillaries and CO2 diffuses in the opposite direction
what is the big picture with cellular respiration
process by which organisms can get energy from their food
what are the two kinds of cellular respiration
aerobic cellular respiration
anaerobic cellular respiration
Describe anaerobic
evolved first
don’t require oxygen
start with glycolysis in cytoplasm
completed in cytoplasm
describe aerobic
requires oxygen
start with glycolysis in cytoplasm
completed in mitochondria
what is the overall equation of aerobic respiration
C6H1206 + 6O2 -> 6CO2 + 6H2O
what are the 3 stages in aerobic respiration overview
stage one: glycolysis (cytoplasm)
stage two: preparation for Krebs (mitochondrial matrix) and Krebs Cycle (matrix)
stage three: electron transfer chain (across inner membrane of mitochondria)
how does NAD and FAD help during aerobic respiration
the aid in the reactions
carrier molecules, carry electrons from broken down glucose to the electron transfer chain
how does NAD and FAD effect the first two stages of aerobic r
accept electrons and hydrogen and deliver electrons and hydrogen to the electron transfer chain
describe stage one: glycolysis
glucose (6-carbon) is broken down into 2 molecules of pyruvate (3-carbon)
yields 2 ATP
How much ATP is needed for stage 1
Whats the net yield of glycolysis
2 ATP
2 ATP + 2NADH + 2 molecules of pyruvic acid
what happens after stage 1
if oxygen around: aerobic respiration, proceed to Krebs Cycle
if no oxygen: Anaerobic respiration, proceed to fermentation
