Cellular Organisation

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  • Created by: elyornais
  • Created on: 09-03-15 20:12
Why do cells have to diffrentiate?
To suit a specific role to carry out a specialised function so the whole organism functions efficiently.
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Why do all cells in an organism contain the same genes?
Because they are all derived from mitotic divisions of the fertilised egg.
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What makes cells different from each other?
Different genes are switched on (expressed) in a cell while the other genes are switched off.
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Give a feature of a muscle cell?
Many mitochondria.
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Give a feature of a white blood cell?
Many lysosomes.
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What is a tissue?
A collection of similar cells that perform a specific function.
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What does epithelial tissue do?
Line the surfaces of organs and often have a protective secretory functiom.
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What is xylem?
Tissue that occurs in plants and made up of a number of cell types. Used to transport water and mineral ions throughout plant and support.
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What is an organ?
A combination of tissues that are coordinated to perform a function.
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Name three tissues that the stomach is made of and give their functions.
1.) Muscle- churns and mixes stomach contents. 2.) Epithelium- protects stomach wall and produces secretions. 3.) Connective tissue- holds together the other tissues.
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Name four tissues that make up a leaf and give their functions.
1.) Paliside mesophyll (made up of paliside cells)- carries out photosynthesis. 2.) Spongy mesophyll- gaseous diffusion. 3.) Phloem- transports organic materials away from leaf. 4.) Xylem- transports water and ions into the leaf.
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What is an organ system?
Organs working together.
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What organs are included in the digestive system?
Salivary glands, oesophagus, stomach, duodenum, ileum, pancreas and liver.
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What is the respiratory system made of?
Trachea, bronchi and lungs.
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What organs are included in the circulatory system?
Heart, arteries and veins.
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Why is an artery described as an organ but a capillary is not?
Artery is made up of more than one tissue but a capillary is made up of just one.
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Other cards in this set

Card 2

Front

Why do all cells in an organism contain the same genes?

Back

Because they are all derived from mitotic divisions of the fertilised egg.

Card 3

Front

What makes cells different from each other?

Back

Preview of the front of card 3

Card 4

Front

Give a feature of a muscle cell?

Back

Preview of the front of card 4

Card 5

Front

Give a feature of a white blood cell?

Back

Preview of the front of card 5
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