keywords:
Bookmark and Share



Front Back
Core
The central part of the body which contains major organs
Dehydration
When something has lost a lot of water
Intensive care
The way a patient is looked after in hospital when they are very seriously ill
Capillaries
Tiny blood vessels
Constrict
Get narrower
Dilate
Get wider
Hypothalamus
The part of the brain that detects the temperature of the bold and also acts as a processing centre for the body's temperature control system
Shiver
Shaking of the muscles to produce more heat energy
Sweat
Liquid that cools the skin by evaporation
Sweat glands
Where sweat is produced
Vasoconstriction
Blood vessels getting smaller
Vasodilatation
Blood vessels getting bigger
Heat exhaustion
A condition where someone has become too hot and dehydrated
Heat stroke
A condition where the body temperature rises out of control
Hypothermia
A condition where the core body temperature has dropped below 350c
Wind Chill
The cooling effect of wind
Kidneys
Organs in the body that produce urine
Plasma
The liquid part of the blood
Urine
Liquid produced by the kidney that contains waste substances and water
Amino Acids
Small molecules that join together to make proteins
Kidney Tubes
The parts of the kidneys that reabsorb substances
Liver
Organ that converts amino acids into urea
Urea
A chemical made in the liver from waste amino acids, and excreted by the kidneys
ADH
Anti-diuretic hormone. A hormone that makes the kidneys produce more concentrated urine
Diuresis
The production of urine
Pituitary Gland
A gland just beneath the hypothalamus in the brain that produces ADH
Secrete
Produce (as when glands in the body produce a hormone or other chemical)
Control System
An automatic system that keeps conditions constant
Enzyme
A protein mad by living things that speeds up chemical reactions in the body
Excrete
Get rid of waste materials
Homeostasis
The way our bodies keep certain factors constant (such as temperature and water levels)
Respiration
The reaction which combines glucose and oxygen to release energy, and produces carbon dioxide and water as waste products
Active Transport
The way that is used to move molecules against a concentration gradient
Diffusion
The way molecules spread from an area of high concentration to low concentration, without anything moving or mixing them
Partially Permeable Membrane
A thin barrier with tiny holes in it that let small molecules in but not big ones
Osmosis
When water diffuses through a partially permeable membrane so that the concentrations on each side become more equal
Tissue Fluid
The liquid that surrounds the cells in the human body
Active Side
The part of an enzyme molecule that substrate molecules fit into
Catalyse
Speed up a reaction
Denatured
An enzyme is denatured when it is heated so that the shape of its active side changes
`Lock and Key` Model
The idea that only molecules with the correct shapes can fit into
Optimum Temperature
The temperature at which enzymes work best
Proteins
Important substances found in all organisms; made of amino acids linked together, Many important structures are made using proteins; enzymes are proteins
Rate of Reaction
The speed of a reaction
Substrate
The reactions in a reaction controlled by enzymes
Antagonistic
Things that work in opposite ways
Effectors
The part of a control system which changes the conditions
Negative Feedback
The action of a control system that changes the conditions back to their original state
Processing Centre
The part of a control system which receives information and decides what to do
Receptor
The part of a control system which detects changes in conditions
x of y cards Next >|