AQA GCSE Biology Unit 3 Keywords

Here is a table of keywords for the Unit 3 exam, enjoy!

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  • Created by: Charbs
  • Created on: 28-04-10 08:53
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Keyword Explanation
Alveolus an air cell of the lungs, formed by the terminal dilation of tiny air passageways.
Expiration the act of expiring, or breathing out; emission of air from the lungs.
Inspiration the drawing of air into the lungs; inhalation.
Active the movement of ions or molecules across a cellular membrane from a lower to a higher concentration, requiring the consumption of
Transport energy.
Diffusion The movement of molecules from a high concentration to a low concentration
Villus on the mucous membrane of the small intestine, where they serve in absorbing nutriment
Anaerobic is a way for an organism to produce usable energy without the involvement of oxygen
Respiration glucose » lactic acid + (minimal) energy
Aerobic is the release of energy from glucose or another organic substrate in the presence of Oxygen
Respiration glucose + oxygen » carbon dioxide + water + energy
Fermentation the conversion of carbohydrates into alcohols or acids under anaerobic conditions used for making certain foods
Fermenter An apparatus that maintains optimal conditions for the growth of microorganisms, used in large-scale fermentation and in the commercial
production of antibiotics and hormones
Haemoglobin An apparatus that maintains optimal conditions for the growth of microorganisms, used in large-scale fermentation and in the commercial
production of antibiotics and hormones.
Osmoregulati he process by which cells and simple organisms maintain fluid and electrolyte balance with their surroundings
on
Various small, single-celled fungi of any of several yeasts of the genus Saccharomyces, used in brewing alcoholic beverages, as a leaven in
Yeast baking breads, and in pharmacology as a source of vitamins and proteins.
A substance, either solid or liquid, used for the cultivation, isolation, identification, or storage of microorganisms.

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Nutrient
Medium the body's oxygen deficiency resulting from strenuous physical activity.
Oxygen debt the production of living organisms from other living organisms
Biogenesis the now discredited theory that living organisms can arise spontaneously from inanimate matter
Spontaneous
generation a medicine that kills some dangerous micro-orangism .…read more

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