Biology Unit 1

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  • Created by: btully
  • Created on: 02-06-14 15:01
Antigen
Protein found on surface of cells e.g. bacteria
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Antibody
Made by b-cells, bind to and destroy antigens
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Anti-toxin
Made by T-cells, bind to toxins and neutralise them.
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Pathogen
Organisms that cause disease
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Bacteria
Very small living cells (1/100th the size of body cells)
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Virus
Not cells- much smaller (1/100th the size of bacterium)
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Colonies
Group of bacteria
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MMR
Measles, mumps, rubella
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MRSA
Methicillin resistant staphyllococcus aureus
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Antibiotics
A drug that kills bacteria
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Mutations
Occur when bacteria multiply. copy their genetic information but make mistakes- can sometimes give an advantage e.g. antibiotic resistance
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Epidemic
When a lot of people in one area get the disease (outbrake)
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Pandemic
When a disease effects more than one country e.g. Swine Flu
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Vaccination
Injecting small amounts of dead or inactive microorganisms to protect from future infections
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Stimulus
Change in your environment which you may need to react to
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Receptors
A group of cells which are sensitive to a stimulus. They change stimulus energy into electrical impulses
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Synapses
When neurones connect they form a synapse, which is a small gap, the dendrites do not touch
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Reflexes
An automatic response to a certain stimuli that help to prevent injury
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Myelin Sheath
Electrical insulator (made of schwann cells)
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Oestrogen
Prevents release of egg (can use as a contraceptive)
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Progesterone
Stimulates production of thick cervical mucus, prevents sperm getting through and reaching egg.
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Pill
Oral contraceptive containing oestrogen and progesterone
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Hormones
Chemical messengers which travel in the blood to activate target cells
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Pituitary Gland
Produces FSH and LH, involved in menstrual cycle
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Ovaries
Produce oestrogen, involved in menstrual cycle
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Auxin
Plant growth hormone that controls growth near tips of shoots and roots
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Homeostasis
Functions of your body that try to maintain constant internal environment
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Toxicity/toxin
Poisonous substance
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Efficiacy
Making sure a drug is effective against the disease it is created for
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Drug
A substance that alters chemical reactions in your body
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Placebo
Looks like a drug but it does not contain the active ingredient
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Statins
Drugs that reduce rate of heart attacks
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Recreational
A drug you don't have to take, but take r the effect
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Addiction
When someones body becomes dependent on the drug and can not function without it
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Withdrawal symptoms
If someone who is addicted to a drug stops taking it, it causes effects such as shaking, paranoia, headaches and vomiting
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Stimulant
Increase heart rate
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Anabolic
Stimulate muscle growth
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Other cards in this set

Card 2

Front

Antibody

Back

Made by b-cells, bind to and destroy antigens

Card 3

Front

Anti-toxin

Back

Preview of the front of card 3

Card 4

Front

Pathogen

Back

Preview of the front of card 4

Card 5

Front

Bacteria

Back

Preview of the front of card 5
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