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Core Science B1a Key Terms
AQA B1a Key Terms for revision
29
Science
10th Grade
03/28/2009

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Cards

Term
Receptors
Definition
They detect stimuli
Term
hormones
Definition
Chemical substances secreted into the bloodstream by glands
Term
motor neurones
Definition
They carry the electrical impulse from the CNS to an effector organ
Term
synapse
Definition
The gap between neurones
Term
relay neurone
Definition
Links sensory and motor neurones in a reflex arc
Term
follicle stimulating hormone (FSH)
Definition
A hormone causing egg maturation
Term
pituitary
Definition
The gland that secrets FSH and LH
Term
maturing
Definition
Oestrogen in the contraceptive pill stops eggs doing this
Term
insulin
Definition
The hormone that increases conversion of glucose to glycogen
Term
homeostasis
Definition
It is a general term describing the control of internal conditions
Term
metabolic rate
Definition
The rate at which the chemical reactions in the body take place
Term
body mass index (BMI)
Definition
This compares your weight to your height
Term
obesity
Definition
A possible consequence of taking in more energy than you use
Term
arthritis, diabetes, high blood pressure, CVD
Definition
Some health problems linked to obesity are
Term
anorexia nervosa
Definition
A disease resulting from a severe lack of nutrients in the diet
Term
cholesterol
Definition
High levels of this increase your risk of blood vessel and heart disease
Term
liver
Definition
Cholesterol is made in the
Term
cell membranes and some hormones
Definition
Cholesterol is needed to make
Term
salt
Definition
Too much of it in your diet increases your risk of high blood pressure
Term
drug
Definition
A chemical substance that alters the way your body works
Term
addiction
Definition
Dependency on a drug is known as
Term
legal recreational drugs
Definition
Alcohol and nicotine are
Term
cirrhosis and liver cancer
Definition
Alcoholics are at risk of these liver diseases
Term
20%
Definition
Alcohol is linked to what % of fatal road accidents in the UK?
Term
emphysema
Definition
Smoking cigarettes cause this disease where alveoli break down
Term
lung cancers
Definition
Carcinogens in tar from cigarette smoke can cause
Term
nicotine
Definition
The addictive drug in cigarette smoke
Term
oxygen
Definition
Carbon monoxide in cigarette smoke reduces this in the blood
Term
hypnosis
Definition
This technique has been found to be most helpful in giving up smoking
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