b3- organisation and the digestive system Flashcards

1
Q

what is a tissue?

A

a group of cells with similar structure and function

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2
Q

what is an organ?

A

a collection of tissues performing specific functions

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3
Q

what is an organ system?

A

a group of organs that perform specific functions on the body

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4
Q

what are carbohydrates made up of?

A

units of sugar

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5
Q

what are protein molecules made up of?

A

chains of amino acids

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6
Q

what do catalysts do?

A

increase the rate of chemical reactions without chemically changing

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7
Q

what are enzymes?

A

biological catalysts, they catalyse specific reactions in living organisms due to the shape of their active site. this is the lock and key theory of enzyme action

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8
Q

what are enzymes made up of?

A

Proteins
The amino acid chains are folded to form the active site, which matches the shape of a specific substrate molecule

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9
Q

what is metabolism?

A

the sun of all reactions in a cell or body

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10
Q

what affects enzyme activity?

A

temperature and ph

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11
Q

what does high temperature do to an enzyme?

A

denature it changing the shape of the active site

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