lesson 6 animal cell specilisation Flashcards
most animal cells are ____________
meaning…
specialised
-meaning they have adaptations to help them carry out their particular function
when cells become specialised, scientists call that _________
differentiation
what is the job of the sperm cell
to join with the ovum (egg cell)
-called fertilisation
during fertilisation, what occurs
the genetic information of the ovum and sperm combine
where do sperm cells contain their genetic information
in the nucleus
sperm cells only contain half the genetic information of a ……..
normal adult cell
sperm cells have a long tail which does what
helps them swim towards the ovum
-they are also streamlined to make this easier
sperm cells are packed full of mitochondria which does what
provide the energy needed for swimming
sperm cells also contain enzymes which does what
allows them to digest their way through the outer layer of the ovum
what is the job of a nerve cell
to send electrical impulses around the body
the nerve cells has a long axon which does what
carries the electrical impulses from one part of the body to another
what does the myelin do
insulates the axon and speeds up the transmission of nerve impulses
the end of the axon has synapses which do what
synapses are junctions which allow the impulse to pass from one nerve cell to another
the cell body of the nerve cell has dendrites which do what
increase the surface area so that other nerve cells connect more easily
muscle cells can contract meaning what
get shorter
