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NCERT Exemplar Solutions Class 7 Science Solutions for Transportation in Animals and Plants - Exercise in Chapter 11 - Transportation in Animals and Plants
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Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
(a) What is dialysis?
(b) When does it become necessary to take such a treatment?
Answer:
a) Dialysis is periodical filtering of blood through artificial kidney
b) Dialysis is done when kidney fail to function.
Video transcript
"hello everyone welcome to later
this is priya and here we have a
question
related to structure of atom let us look
into it
compare the properties of electrons
protons
and neutrons so coming to the property
of
electrons first so electrons
are first we are looking into the
property of
charge so the electrons will have
a negatively charged they charge
negative
so they are negatively charged
coming to the protons they are
positively charged
coming to the neutrons they don't have
charge no charge neutrons have
no charge and the next property
regarding the location of these electron
protons and neutrons in an atom
electrons are located outside the
nucleus
they are present outside the
nucleus
and protons are present inside the
nucleus
they are present inside the nucleus and
neutrons are also present inside the
nucleus
along with the protons in coming to the
weight of
electrons mass of electrons
are negligible mass of the
electron in an atom is negligible
because to beast
get stability the electron can be lost
from the atom
are gained by the atom so the mass of
electron is negligible it can be changed
from time to time
and coming to the proton proton has one
a m u and neutron
also have one a m
u and coming to the affinity
of the electrons they are
attracted towards attraction
they have attraction towards positively
charged
positive charges for example electrons
are attracted towards
protons and protons are attracted
towards
they have attraction towards negatively
charged that means protons will be
attracted by
electrons and electrons are attracted by
protons because
opposite charges will always attract
whereas coming to the affinity of these
neutrons they
do not attract they do not attract and
they do not be attracted by any kind of
electron or proton so there will be no
attraction towards any charged particles
because they don't have
charge so this is about the question
students hope you understand this video
if you like my video please subscribe to
lido
and if you have any doubts you can drop
a message in comment box
thank you"
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