Respiratory Quotient Video Lecture | Biology for JAMB

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now that we have discussed about both
aerobic and anaerobic respiration we
will quickly talk about a new term or a
new concept for the respiratory quotient
now what is respiratory quotient this is
a parameter which is used to measure how
good a particular substract is behaving
or how good a substrate is performing as
far as the process of respiration is
concerned the respiration is all about
taking in oxygen and giving out carbon
dioxide right that is all about
respiration so if I am talking about
aerobic respiration sorry needs of
anaerobic respiration this ocean will
always be infinity because there will be
no oxygen taken in friend so forget
about that part for aerobic respiration
if we want to measure which subtracts
are better at respiring with low
requirement of oxygen so we need some
parameter to measure it so that
parameter is respiratory quotient so let
us see how have we defined this
parameter so this is the ratio of volume
of carbon dioxide released to the volume
of oxygen taken in service and
respiration is all about taking in
oxygen and giving out carbon dioxide
right during the process of when I am
talking about the resolution that is
what happens but it is LV respiration so
how much carbon dioxide is given out
divided by how much oxygen is taken in
that is respiratory quotient so co2 out
by o2 in so this ratio will actually
tell us how much carbon dioxide is the
particular substrate k2
getting out when it takes in a
particular amount of oxygen so this is
denoted by our qu and this is also known
as a respiratory ratio because it is a
ratio of two volume so it is also a
spiritual issue and this is a
dimensionless number now the value of
respiratory quotient values with
different respiratory substrates because
every substract will have its own
capacity to give up carbon dioxide when
given a particular amount of oxygen so
let us look at some of the different
substrates what is their respiratory so
let's talk about carbohydrates and
carbohydrates also let's talk about
glucose so glucose is c6h12o6 so and
proposed as oxidized carbon dioxide and
water as form so this is how the
equation looks like for complete
oxidation of glucose or a complete
restoration of glucose so what would be
the respiratory quotient in this case
that is number of molecules of carbon
dioxide which is 6 divided by number of
oxygen taken in which is again 6
so then SPD 3 quotient has one similarly
let us look for facts for example
vomiting acid so what the spermatic acid
it is C's 16 age 32 or 2 plus 1102 gives
c12h22o11 images so close +4 CO 2 plus 5
h2o so this is the balanced equation for
complete oxidation of fatty acid so here
there is primitive emotion tell me the
number of molecules of carbon dioxide
formed which is 4 divided by oxygen used
which is 11 so oh my 11
0.36 so this is the respiratory ocean
for emitting acids if you talk about
other organic acids like Matic acid then
you will see that the respiratory
quotient is quite high in fact in some
of the organic acid it was high up to
say 4 or 5 also so fatty acid is c4h
3211 I'm sorry c4 h30 and some c4 8 6 &
5 so this is malic acid so when this is
oxidized it forms for co2 that's 3 H 2 O
so if this is the respiratory quotient
will be 4 by 3 so which is equal to 1
point 3 3 so here if you see some of
them have a respiratory quotient less
than 1 some have greater than one summer
equal to 1 so what do we infer from this
what we conclude from the value of the
respiratory ocean now any subtract which
has a respiratory ocean less than 1 for
example the paralytic acid it means that
this abstract needs more oxygen for
respiration because in this case it
produces less carbon dioxide so even
those how much of oxygen has been
supplied it produced quite less carbon
dioxide so if you want you to respond
really well you wanted to give out more
carbon dioxide so in that case you have
to provide more oxygen so if the
respiratory quotient is less than 1 that
means you need to supply more oxygen to
that substract for better respiration
whereas if the respiratory quotient is
greater than 1 for example in case of
magnet acid it means that the
respiratory substract contain more
oxygen and therefore it means less
oxygen for oxidation it does not mean
that much of oxygen for oxidation and if
it is 1 that means it is that ideal
scenario
as the correct amount of oxygen which is
required to respire right so that was
all about respiratory quotient thank you
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