Post Pituitary Hormones Video Lecture - NEET

hello friends this video on chemical
coordination and integration part 9 is
brought to you by exam for calm no more
fear from example normal so we see that
this luteinizing hormone and the
follicle stimulating hormone both of
them stimulate gonadal activity that is
the female gonads
the sexual organ so it helps the growth
and development of the sexual organs and
that is why both of them together I do
not as gonna new province because of
their functions they are called Bernardo
province LH and FSH right so you got
what their functions LH will induce
ovulation and FSH will induce the growth
and development of the follicles be it
the ovarian follicle or be it the corpus
luteum so these where all the hormones
which are secreted by the anterior
pituitary gland now let us look at the
posterior pituitary hormones now what
are the hormones secreted by posterior
pituitary as I had mentioned before
posterior pituitary is nothing but it is
a part of the hypothalamus
so the hormones which are secreted by
they were actually secreted by the
hypothalamus
so hypothalamus makes these hormones and
transport them to posterior pituitary
through the axon terminals of
hypothalamic neurons so in one way we
can say that they are secreted in the
posterior pituitary because the axon
terminal of the neuron ends and the
posterior pituitary but actually they
ask emphasized by the hypothalamus
so what are these organs there are two
organs like this oxytocin and
vasopressin so let us see what is
oxytocin this is also known as the birth
hormone by both the quadroon because
this also acts finally on the female
body when it regulates the contraction
and relaxation of uterus muscles during
childhood so have you ever seen that
when cannabis
have you ever heard of a lady
experiencing a lot of pain while she
gives birth to her child why does that
have it not
when a female gets pregnant what happens
is that the child is a child which
remains inside her body in the uterus so
you do this is that satellite structure
which can actually keep the child for
nine months right
now when the child birth has to take
place the child has to be moved out of
the uterus and how does that means main
happens that movement is facilitated by
the contraction and relaxation of the
uterus muscles that contraction and
expansion actually pushes the child
towards the vagina opening so that the
child can be brought out of the female
body right so during this contraction
and relaxation of the muscles of the
uterus some Haroon has to play the role
so that part one is the oxytocin so what
does this hormone do this organ acts on
the smooth muscles of the body and cause
their contraction so somebody has to
initiate that process of contraction and
that is done by the oxytocin partner
that is why this oxytocin is also known
as the will be ejecting hormone by a
milk ejecting hormone because it
regulates the milk expansion during
lactation now please understand this
difference between prolactin and of
oxytocin so what does it do oxytocin
will only help in the contraction of
muscles now in the mammary gland you
need some hormone which actually helps
the vagary glands to grow and develop so
that it can reduce me so that particular
hormone is the prolactin which helps the
mammary gland to be developed so that it
can produce men on the other side you
need another hormone which can cause
contraction of the muscles of the
mammary gland so that the milk can be
brought out so that the militant is
sucked in so those that those hormones
which actually helped in the contraction
of the muscles that is the oxytocin so
that is why it is known as milk ejecting
hormone because it does not help in the
production of milk
does not help the mammary gland in any
way it just helps the milk to be ejected
out of the mammary gland that is why it
is milk ejecting order
next is the vasopressin when I say do it
regulates the water balance in the body
so one example of vasopressin or massive
aerosol is often known as the ADH that
is anti deleting hormone that is because
it controls the water balance in of the
body how does it control the water
balance by reabsorption of water and
electrolytes by DCT in kidneys now as we
discussed about the experi system in
detail when we spoke about kidneys right
inside kidney what are the functional
units of kidney they are nephrons then
this is how the structure of a nephron
looked like you remember yes so here we
saw that there was a part where
reabsorption of water and electrolytes
took place known as the DCT or distal
convoluted tubules so this portion this
yellow head structure a bit too much
white structure this was mr. Ahn who
limited tibul so bad a lot of water
reabsorption took place so this our
bottoms really absorption in that is too
convoluted typically would happen due to
the presence of this hormone vasopressin
vasopressin is also known as ADH or this
is auntie junetta k-- hormone so this is
antidiuretic hormone why it is called
active you really can t means opposite
or against do you really so this means
it limits the formation of Union so that
is my auntie aleni
or auntie you ate the currently delayed
because it limits the formation of Union
or it causes separation of you brain why
so because it is trying to absorb more
and more water from the
so it is not and I'll give a lot of you
bring the reform that is my aunty delay
the corner so that is not something
wrong because it is actively trying to
reabsorb more water for the body we just
want to be helpful for them but so these
two are ones oxytocin and vasopressin
and the posterior pituitary hormones so
as I said this is that interior a
hormone thank you please visit
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