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生物化学

人体结构

2025-03-31 生物化学 加入收藏
WordDefinitionTopicaddictivea substance on which a person can become physically
WordDefinitionTopic
addictivea substance on which a person can become physically dependentHumans as organisms
ADHAnti-Diuretic HormoneHumans as organisms
adrenalina hormone that is secreted when a person is stressed - it increases the heart and pulse rate and blood pressureHumans as organisms
aerobicwith oxygenHumans as organisms
alveolitiny air sacs in the lungs where gas is exchanged during breathingHumans as organisms
amino acidscomplex molecules which form the building-blocks of proteinsHumans as organisms
anaerobicwithout oxygenHumans as organisms
Antibioticssubstances kill bacteria and fungal infectionsHumans as organisms
antibodyprotein produced by the body's immune system that attacks foreign invaders (antigens)Humans as organisms
antibodiesproteins produced by the body's immune system that attack foreign invaders (antigens)Humans as organisms
antigensforeign invaders in the body that trigger an immune responseHumans as organisms
arteriesthick-walled muscular tubes which carry blood away from the heartHumans as organisms
Assimilationthe incorporation of the products of digestion into the body, where they are used to provide energy or for growth and repair of tissuesHumans as organisms
asthmachronic condition involving breathlessness due to inflammation of the bronchiolesHumans as organisms
ATPa high-energy chemical used in cells as an energy storeHumans as organisms
bilea substance produced in the liver which emulsifies fats to prepare them for digestionHumans as organisms
blood plasmathe liquid part of the blood. It contains useful things like glucose, amino acids, minerals, vitamins (nutrients) and hormones, as well as waste materials such as ureaHumans as organisms
bronchithe plural of bronchus - the two major air tubes in the lungsHumans as organisms
bronchiolesthe many small, branching tubules into which the bronchi subdivideHumans as organisms
bronchusone of the two tubes into which trachea subdivides as it enters the lungs. The plural of bronchus is bronchi.Humans as organisms
capillariesextremely narrow tubes which carry blood around our tissuesHumans as organisms
carbohydraseenzyme that breaks down carbohydratesHumans as organisms
carbohydratesfood group consisting of sugars, starch and cellulose. They are vital for energy in humans and will be stored as fats if eaten in excess. In plants, carbohydrates are important for photosynthesis.Humans as organisms
carbon dioxidegaseous compound of carbon and oxygen which is a by-product of respiration, and which is needed by plants for photosynthesisHumans as organisms
central nervous systemthe brain and spinal cordHumans as organisms
ciliatiny hairs which line the respiratory tract. They beat continuously to move mucus and dirt up the bronchi and tracheaHumans as organisms
CNSCentral Nervous System (brain and spinal cord)Humans as organisms
Colonthe large intestine, where all the water in our food and drink is absorbed into the bloodHumans as organisms
comaa state of deep unconciousness in which a person does not respond to any external stimuliHumans as organisms
common colda mild viral infection that causes inflammation of the airwaysHumans as organisms
convexcurving outwardsHumans as organisms
co-ordinationproducing a sensible response when you are stimulated. For example, when you taste something nice you salivate, you don't scratch your toeHumans as organisms
denaturedisable by changing the normal qualities or nature of somethingHumans as organisms
denaturingdisabling by changing the normal qualities or nature of somethingHumans as organisms
de-oxygenatednot containing oxygenHumans as organisms
dependencystate of being mentally or physically reliant on something, especially a drugHumans as organisms
diabetesa serious disease in which the body is unable to regulate blood sugarHumans as organisms
diaphragma large sheet of muscle that separates the lungs from the abdominal cavityHumans as organisms
digestive systemsystem of organs are involved with the ingestion, digestion, absorption of foodHumans as organisms
dilatedwidened or expandedHumans as organisms
Duodenumthe first part of the small intestine. Bile secreted by the liver makes the contents of the duodenum alkaline and helps to emulsify (break up) the fats and oils in our food.Humans as organisms
effector organa muscle or gland which has an effect when it is turned on by a motor neuroneHumans as organisms
effectororgan which has an effect when stimulated (eg muscles or glands)Humans as organisms
effectorsorgans which have an effect when stimulated (eg muscles or glands)Humans as organisms
emulsifiedconvert into dropletsHumans as organisms
endocrine systembodily system of glands which produce and secrete hormones into the bloodstreamHumans as organisms
endocrine glandone of the glands which secrete hormones into the bloodstreamHumans as organisms
energyreleased in respiration and required for virtually all metabolic activities in living thingsHumans as organisms
enzymesproteins which catalyse or speed up chemical reactions inside our bodiesHumans as organisms
epiglottissmall flap at the back of the tongue; it closes the top of the trachea when we swallow so that food does not go down the wrong way. (It does not always work properly; if food goes down the wrong way you cough to try to get the lump of food out of your windpipe.)Humans as organisms
exhalebreathe air outHumans as organisms
FSHFollicle Stimulating Hormone, which stimulates oestrogen production and the growth of follicles (egg-sacs) in the ovary. It is secreted by the pituitary gland.Humans as organisms
fatty acidslong-chain molecules made up of hydrogen and carbon atomsHumans as organisms
feedback loopbodily system in which the effect of a hormone's action or lack of action is fed back into the system, turning production of the hormone off or on.Humans as organisms
fibrenon-digestible carbohydrates. Fibre is essential as a bulking agent to help food pass quickly and easily through the bowel. A lack of fibre in the diet can lead to constipation.Humans as organisms
flu(influenza) a highly contageous viral disease that can cause deathHumans as organisms
Gaseous exchangetransfer of oxygen from the air into our blood and carbon dioxide out of our blood into the airHumans as organisms
genetic diseasedisease which children can inherit from their parent/s as a result of abnormalities in their genesHumans as organisms
glucoregulationkeeping a constant blood sugar levelHumans as organisms
glucosea simple sugar made by the body from food, which is used by cells to make energy in respirationHumans as organisms
glycerola soluble carbohydrate which is coverted into glucose by the liverHumans as organisms
goblet cellscells in the lining of the trachea and bronchi which make mucusHumans as organisms
hormoneschemical messengers produced in glands and carried by the blood to specific organs in the bodyHumans as organisms
hybrid vigourthe increased strength and size of a hybrid (an offsping produced as a result of breeding two genetically different organisims) compared to that of the parentsHumans as organisms
hydrochloric acida component of gastric juice secreted in the stomach. It helps chemical digestion by breaking down food and providing the optimum pH for the digestive enzyme pepsinHumans as organisms
hyperglycaemiaGreek for 'too much sugar in the blood'Humans as organisms
hypoglycaemiaGreek for 'too little sugar in the blood'Humans as organisms
hypothalamusthe part of the brain responsible for controlling the body's reaction to temperature, hunger and thirstHumans as organisms
immune systemthe body's defence system against diseases and infectionsHumans as organisms
inhalebreathe air inHumans as organisms
inhalersdevices that administer medication to the airwaysHumans as organisms
innate behaviourthe automatic response produced by reflex arcs - for example knee jerk reflex, withdrawal reflex, blinking, salivatingHumans as organisms
intercostal musclesmuscles between the ribs which raise the ribcage by contracting and lower it by relaxingHumans as organisms
in vitro fertilisationfertilisation outside the womb. 'In vitro' means in a test-tube (or glass dish)Humans as organisms
ionpositively- or negatively-charged particles - eg positively charged hydrogen, sodium and potassium atoms. Ion charge helps determine a substance's acidity or alkalinityHumans as organisms
ionspositively- or negatively-charged particles - eg positively charged hydrogen, sodium and potassium atomsHumans as organisms
kidneyone of two organs in humans which extract impurities from the bloodHumans as organisms
LHLuteinising Hormone, secreted by the pituitary gland, which stimulates ovulation.Humans as organisms
lactic acida toxic chemical produced during anaerobic respirationHumans as organisms
learnt behaviourcomplex behaviour which is aquired through experience. We don't all respond in the same way to a specific stimulus - for example some people don't eat chocolate cake because they have learnt that it makes them ill, even though they like the taste.Humans as organisms
liverorgan which constitutes the largest gland in the body. It produces bile to aid the digestion of fats, stores glucose in the form of glycogen, and helps break down proteins and carbohydratesHumans as organisms
lymphocyteswhite blood cells which attack pathogens by producing antibodiesHumans as organisms
metabolic activitiesthe biochemical activities that occur within the body to keep us aliveHumans as organisms
metabolic wasteharmful by-products of metabolic processesHumans as organisms
metabolismthe sum of all chemical processes taking place in our cells, and the rate at which these proceedHumans as organisms
mineral saltsinorganic chemical compoundsHumans as organisms
motormotor neurones carry messages out of the CNS to effector organsHumans as organisms
mucusslimy white protein which lines the respiratory tract and alimentary canalHumans as organisms
mucus membranesthin lining tissues which secrete mucusHumans as organisms
neuronea nerve cell. It carries an electrical message or impulse when it is stimulatedHumans as organisms
oestrogenfemale hormone secreted by the ovariesHumans as organisms
Osmoregulationprocess of keeping a constant amount of water and salts in the bloodHumans as organisms
ovariesa pair of organs in the female reproductive system where ova (eggs) are producedHumans as organisms
oxygengaseous element making up about 20% of the air, which is needed by living organisms for respirationHumans as organisms
oxygen debtthe amount of extra oxygen required by the body for recovery after vigorous exerciseHumans as organisms
oxygenatedcontaining oxygenHumans as organisms
palpitationsforceful or irregular heartbeatsHumans as organisms
pancreaslarge gland located in the abdomen near the stomach which produces digestive enzymes and the hormone insulinHumans as organisms
parasitesan organism that lives in or on another organismHumans as organisms
passive immune systemthe body's natural barriers which are always there, eg the skinHumans as organisms
peristalsiswave-like muscular contractions in the smooth wall of the gut which move food through the alimentary canalHumans as organisms
pHscale of acidity/alkalinity. pH below 7 = acidic, pH above 7 = alkalineHumans as organisms
photoreceptorsthe rods and cones of the retina - they respond to light stimuliHumans as organisms
plasmaliquid, non-cellular part of the bloodHumans as organisms
plateletswhite blood cell fragments which circulate in the blood and assist in clottingHumans as organisms
precipitatea suspension of particles in a liquid (formed when a previously dissolved substance becomes insoluble)Humans as organisms
progesteronefemale hormone secreted by the ovariesHumans as organisms
proteinsorganic compounds made up of amino acid molecules. One of the three main food groups, proteins are needed by the body for cell growth and repair.Humans as organisms
protein synthesismanufacturing of proteinsHumans as organisms
protozoana minute, usually single-celled, organism which does not photosynthesise. Plural is protozoaHumans as organisms
protozoaminute, usually single-celled, organisms which do not photosynthesise. Singular is protozoan or protozoonHumans as organisms
relay neuronesthese nerve cells carry messages around the CNSHumans as organisms
reactantssubstances present at the start of a chemical reactionHumans as organisms
reagentchemical used in a laboratory testHumans as organisms
receptor cellsspecialised cells which react to stimuli and convey impulses down nervesHumans as organisms
receptororgan which recognizes and responds to stimuliHumans as organisms
receptorsorgans which recognize and respond to stimuliHumans as organisms
red blood cellscells which contain haemoglobin and carry oxygenHumans as organisms
reflex actionan involuntary reaction that happens rapidly in response to a stimuli eg moving your hand from a flameHumans as organisms
reflex arca nerve pathway which produces an automatic responseHumans as organisms
refracteddeflected from a straight path; bentHumans as organisms
renal arterycarries blood to the kidneysHumans as organisms
renal veintakes blood away from kidneysHumans as organisms
responsereaction to a stimulus; the effect produced by an effector organ - for example you salivate when you taste somethingHumans as organisms
retinathe inside layer in the eye that is responsive to lightHumans as organisms
RNA(Ribonucleic acid) - it converts the genetic information stored in DNA into proteinsHumans as organisms
SalivaFluid secreted by glands in the mouth which moistens and softens food. It contains the enzyme amylase which digests starch, and a lubricant which makes food slippery and easy to swallow.Humans as organisms
saltsclass of chemical compounds, mostly metallic oxides. Examples are sodium chloride, potassium chloride, and magnesium sulphateHumans as organisms
sense organorgan which recieves and responds to a stimulus - for example, the eye, ear, taste buds, skin, noseHumans as organisms
sensorysensory neurones carry messages from sense organs into the CNSHumans as organisms
stereoscopic visionhaving two eyes side-by-side, each delivering a slightly different view to the brain. It enables humans to judge distance, depth and speed.Humans as organisms
stimulithings that set off a reaction in the nervous system - for example, light, heat, sound, gravity, smell, taste, or temperature. The singular is stimulusHumans as organisms
stimulussomething that causes a response; a sense impression that sets off a reaction in the nervous system - for example, light, heat, sound, gravity, smell, taste, or temperature. The plural is stimuli.Humans as organisms
substratea substance on which enzymes actHumans as organisms
synapsethe gap between two neurones across which nerve signals must jumpHumans as organisms
synthesisedmade or put togetherHumans as organisms
target organsthe organs which hormones take effect uponHumans as organisms
testosteronethe main male sex hormone, secreted in the testesHumans as organisms
thermoregulationthe process of keeping a constant body temperatureHumans as organisms
thoraxthe chest, containing the heart and lungs and encased by the ribsHumans as organisms
tracheathe windpipe or tube from the back of the mouth to the top of the lungsHumans as organisms
ultramicroscopictoo small to be seen with a normal microscope. (Electron microscopes are usually used to study viruses)Humans as organisms
ureaa nitrogenous waste product resulting from the break down of proteins. It is excreted in urineHumans as organisms
uterusaka womb - this is where the fertilised ovum developsHumans as organisms
Vaccinessubstances containing disabled antigens of a particular disease, usually administered via injection. Vaccines stimulate the body to produce antibodies to provide immunity against that disease.Humans as organisms
vaccinatingimmunisi


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