B3 revision definition notes

this is a difficult topic that has to be covered and understand without hesistation and lack of confidence.

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  • Created by: zeynab.m
  • Created on: 20-04-14 23:07
what is circadian rhythms?
A daily rhythms.
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what is a biological clock?
A timing mechanism in the body that helps to control various rhythms such as sleeping and eating.
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what are hormones?
chemical messengers that are made up in one part in the body and are carried in the blood streams to other areas which they have affect on, such as metalonin which changes the actions of parts of the body, so we feel sleep.
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what is photoperiodism?
the way in which living organisms respond to changes in day length.
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what is germinates?
A process in which a seed beings to grow into young plant.
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what is vaccine?
a substances containing dead or weakened pathogens, introduced into the body to make a person immune to that pathogens.
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what is antigens?
a protein that white blood cells recognise as foreign, for example, on the surface of a bacterium.
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Card 2

Front

what is a biological clock?

Back

A timing mechanism in the body that helps to control various rhythms such as sleeping and eating.

Card 3

Front

what are hormones?

Back

Preview of the front of card 3

Card 4

Front

what is photoperiodism?

Back

Preview of the front of card 4

Card 5

Front

what is germinates?

Back

Preview of the front of card 5
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