Slides in this set
Keywords: impulse, glands, secret, sense organ, central nervous system, reflex arc, pituitary gland, IVF
Menstrual Cycle HSW Definition
& Hormones Word
Hypothesis A possible explanation of a problem that can be
Evidence The data or observations that are used to support a
given hypothesis or belief.
Theory An idea that might explain the results which is
based on scientific results.
The contraceptive pill contains oestrogen which
inhibits FSH so no egg can mature. Hearsay A rumour or idea with no evidence to back it up.
Fertility treatment gives extra FSH.
Control A experiment to show what would have happened
if you had not changed the independent variable.
Obesity linked Body mass index Starvation (or Anorexia
with arthritis, BMI=weight (kg) nervosa) causes thinness, Precision Small divisions on the measuring device gives high
diabetes, high height2 (m) wasting muscles, poor precision.
blood pressure immune system & periods
Accuracy An accurate measurement is one which is close to
& heart disease. to stop.
the true value.
Stimulus Reliability The results of an investigation may be considered
= how fast reliable if they can be repeated.
reactions take Ethical Whether something is considered morally right or
place in cells. wrong.
High in Validity Valid data answers the question asked by the
athletes, investigation. Data are only valid if the experiment
young, men is a fair test.
High Salt high blood pressure ·Fibre ·Minerals
Homeostasis = controlling internal conditions including High Cholesterol heart disease ·Protein ·Water
water, ions, blood sugar and temperature. ·Carbohydrates
Water and ions kidneys & urine Statins lowers cholesterol
Saturated fats = bad If you don't get them all in the
Temperature skin and brain (so enzymes work properly)
Mono & Polyunsaturated = good right amounts you are
Blood Sugar Pancreas
Substance Causes Bacteria produce toxins. E.g. salmonella and MRSA.
Antibiotics kill them by damaging the cell wall.
Alcohol Damage to liver & brain
Viruses damage cells and release toxins. They cannot be killed by
Slows reactions, loss of self control
antibiotics as they hide in human cells in order to reproduce.
Cannabis Can lead to hard drugs
Psychological (mind) problems Infectious diseases are Skin, blood clotting and mucus
Nicotine Addiction caused by pathogens in the breathing system stop
bacteria and viruses. pathogens entering the body.
Tar Emphysema Semmelweiss
realised that Your white blood
Carbon Monoxide Low birth mass in babies doctors need to cells help to defend
washing their you against
hands. pathogens by
Carcinogens Cancer ingesting them,
Thalidomide Limb abnormalities in babies Some medicines relieve
Now treats leprosy & cancer symptoms but do not kill the
pathogen e.g. painkillers.
Drugs change the chemical process in your body
making you addicted to them. When addicts stop they
New medicines are extensively Many types of bacteria have
have withdrawal symptoms.
tested and trialled to make sure developed antibiotic
Some recreational drugs are legal and others are they work and are not toxic. resistance as a result of
illegal. The overall impact of legal drugs on health is Alexander Flemming discovered natural selection.
much greater. penicillin.
Vaccines contain dead or
Your white blood cells produce
antibodies as a practice. This
makes you immune to bacteria If bacteria or viruses mutate, new
and viruses. strains can appear which spread
Stimulants e.g. caffeine, cocaine & nicotine make you rapidly to cause epidemics (one
more alert by increasing the speed the nervous system The MMR jab is for measles, country) and
works at. pandemics
mumps and rubella. Some people
Depressants e.g. cannabis and alcohol slow your worried that the jab caused (several countries).
nervous system down by stopping nerve impulses. autism.…read more