CB1C Specialised Cells Flashcards

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1
Q

How is a sperm cell adapted to its function

A

1) A sperm cell has a long tail so it can swim to the egg

2) It has lots of mitochondria in the middle section to provide the energy (from respiration) needed to swim this distance

It also has an acrosome at the front of the ‘head’, where it stores enzymes needed to digest its way through the membrane of the egg cell

It also contains a haploid nucleus

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2
Q

How is an egg cell adapted to its function:

A
  1. It contains nutrients in the cytoplasm to feed the embryo
  2. It has a haploid nucleus
  3. Its membrane changes structure to stop any more sperm getting in
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3
Q

What are specialised cells ?

A

Specialised cells are cells that have a structure which are adapted to a specific function

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4
Q

What happens in sexual reproduction

A

The nucleus of an egg cell fuses with the nucleus of a sperm cell to create a fertilised egg, which then develops into an embryo

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5
Q

What is a haploid

A

A haploid contains half the number of chromosomes thats in a normal cell

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6
Q

What is the function of a sperm

A

To transport the male’s DNA to the female’s egg

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7
Q

What is the function of ciliated epithelial cells

A

To move substances - the cilia beat to move substances in one direction along the surface of the tissue

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8
Q

What is the main function of an egg

A

They carry the female DNA and nourish the developing embryo in its early stages

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9
Q

Where are ciliated epithelial cells located and why are they there

A

The lining of the airways
These help to move mucus and trapped particles up to the throat so it does not get swallowed and does not reach lungs

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