What is Anaerobic Respiration? Video Lecture | Science Class 7

you are running a thousand five hundred
meter race breathing deeply to get the
oxygen so that you can respire and keep
up the energy supply to your muscles
your muscles keep wanting more and more
energy but your lungs can't keep up do
you have to quit the race no in the
respiration video we discovered the
difference between aerobic and anaerobic
respiration and then looked at aerobic
respiration in more detail sometimes
animals and plants can't get enough
oxygen to respire aerobic P such as
during intense exercise but they still
need to respire to survive after all
everything relies on respiration for
energy luckily there is a back-up plan
anaerobic respiration in this video we
are going to have a look at anaerobic
respiration in both animals and plants
starting with animals a cheetah
sprinting to catch some prey cannot take
in enough air and blood around the body
forcing law for aerobic respiration the
heart and lungs can't keep up so
anaerobic respiration is carried out
instead here is the generalized equation
for in aerobic respiration see how it
differs from aerobic respiration there
is no oxygen involved in anaerobic
respiration it is much less efficient
than aerobic respiration and much less
energy is released this is because the
glucose is only partially broken down
another problem is that lactic acid is
produced this is actually a poisonous
chemical that if it builds up in the
body the muscle stops working and you
get a muscle cramp you can only get rid
of lactic acid by taking in oxygen again
and thus replacing the oxygen that
oxygen is needed to break down lactic
acid turning it into carbon oxide and
water you know how you breathe deeply
after intense exercise this is your body
replacing the bolt of oxygen tape so
that is how anaerobic respiration works
in animals
what about in plants the oxygen supply
can run out for plants - such as in
waterlogged soils the stem forces plans
to have to carry out anaerobic
respiration as that you need to respire
constantly here's the generalized
anaerobic respiration equation for
plants notice our set of lactic acid
being produced ethanol and carbon
dioxide is made instead in case this
process is called fermentation and it is
used to bake bread improve alcohol if
the law is the alcohol found in p-n wine
for example and in bread making it is a
carbon dioxide that is useful the
bubbles in carbon dioxide help the bread
rise by expanding the dough so you
should now know that when our heart and
lungs cannot keep up with the oxygen
demand or plants do not have access to
sufficient oxygen we have a B plan
anaerobic respiration this is when the
glucose is broken down directly but it
produces much less energy than aerobic
respiration which is why is the second
choice and in animals it produces lactic
acid as a by-product which causes muscle
cramps and so we end up with an oxygen
Ted which needs repaying of the exercise
I stopped
you