B12 - Respiration Flashcards
What is aerobic respiration?
a series of chemical reactions in cells that use oxygen to break down nutrient molecules (glucose) to release energy
what is the word equation for aerobic respiration?
glucose + oxygen –> carbon dioxide + water
what is the balanced symbol equation for aerobic respiration?
C6H12O6 + 6O2 –> 6CO2 + 6H2O
what is anaerobic respiration?
a series of chemical reactions in cells that break down nutrient molecules to release energy without using oxygen
does anaerobic respiration release more or less energy per glucose molecule than aerobic respiration
less
what is the word equation for anaerobic respiration in muscles during strenuous exercise?
glucose –> lactic acid
fill in the blanks:
lactic acid ______ __ in _______ and _____ during ________ exercise causing an ______ ____
builds
up
muscles
blood
vigorous
oxygen
debt
state 3 ways oxygen debt is removed after exercise
-continuation of fast heart rate to transport lactic acid in the blood from the muscles to the liver
-continuation of deeper and faster breathing to supply oxygen for aerobic respiration of lactic acid
-aerobic respiration of lactic acid in the liver
what is the main nutrient used to provide energy in all cells?
glucose
what are 6 uses of energy in living organisms?
-muscle contraction
-protein synthesis
-cell division
-growth
-passage of nerve impulses
-maintenance of a constant body temperature
why do muscles carry out anaerobic respiration?
because the demand for energy exceeds the supply of oxygen
state 3 things that happen to muscles when lactic acid builds up in muscles
-become fatigue
-cramp
-become painful
how and where is the lactic sent to after the strenuous exercise stops?
how: the bloodstream
where: the liver
what is oxygen debt?
the need for oxygen after exercise
what does the liver do to the lactic acid?
oxidises it / breaks it down
fill in the blank:
people continue to breath ____ and ____ after strenuous exercise has stopped in order to supply extra ______ to _______ or _______ / _________ the _____ ______ ____ into ________ products
fast
deep
oxygen
oxidise
respire
breakdown
toxic
lactic
acid
harmless
why does a person’s heart continue to beat fast after strenuous exercise?
to transport lactic acid in the blood from the muscles to the liver
why do we use aerobic respiration more than anaerobic respiration?
-not painful
- the energy per glucose molecule released is more
why do people consume more oxygen and why do people’s heart beat fast when doing strenuous exercise
when exercising, your muscles contract more.
to contract more, the muscles need more energy.
to get more energy, the muscles need to respire more.
to respire more, the muscles need more oxygen.
to get more oxygen, breathing rate and heart rate increases.
why does the oxygen consumption not return to resting rate immediately after the strenuous exercise stops?
because of oxygen debt. oxygen debt is the need for oxygen after exercise. our body needs more oxygen than normal to break down the lactic acids in our body.
does aerobic respiration release energy? more than anaerobic respiration
yes, yes
does anaerobic respiration release energy? more than aerobic respiration?
yes, no
does aerobic respiration release carbon dioxide?
yes
does anaerobic respiration release carbon dioxide?
no
does aerobic respiration produce waste products? what?
yes - CO2
does anaerobic respiration produce waste products? what?
yes - lactic acids
