B2 0.0 / 5 ? BiologyB2GCSEOCR Created by: cookiealfiepatchCreated on: 12-05-16 10:37 the heart double pump, pumps blood around the body (carries nutrients, oxygen to cells and removes waste) 1 of 22 3 types of blood vessels arteries(away), veins(back) and capillaries(between them to cells) 2 of 22 heart disease is... a structural/functional abnormality 3 of 22 causes of heart disease... lifestyle factors (smoking, not exercising, being overweight) and genetic factors 4 of 22 blood pressure can... monitor risk of heart disease 5 of 22 the 2 numbers in blood presure mean... high number=contracting and low number=relaxing 6 of 22 infection is caused by... microorganisms that harm cells (bacteria, fungi and viruses) 7 of 22 the ideal conditions for microorganisms to multiply are... warmth, nutrients and moisture 8 of 22 the immune system... white blood cells make antibodies and engulf/digest microoganisms 9 of 22 what do antibodies do? they lock onto antigens (the markers on the sides of microorganisms) which allows WBC to find them 10 of 22 what do memory cells do? remember the antibodies for that specific disease allowing a quicker response to a 2nd infection 11 of 22 vaccinations are... weakened forms of dieases which mean antibodies are made so that if you are infected you can fight the disease easily 12 of 22 what is herd immunity? when 95% of the population is vaccinated meaning the un-vaccinated are protected as it is unlikely that a epidemic will happen 13 of 22 how do diseases become resistant? random mutations cause new strains which are less affected by antibiotics so reproduce and pass on resistance 14 of 22 how to stop diseases becoming resistant? complete antibiotic course and only use when completely necessary 15 of 22 what are the 4 types of clinical trials? blind trials, double-blind trials, open-label trials and long-term trials 16 of 22 what are placebos? some people take a drug which isn't acctually anything so that the affect of the real drug can be compared to it 17 of 22 what are the inputs and outputs that effect water levels? inputs= food/drink and respiration. outputs= sweating, breathing and urine 18 of 22 how the body balances water levels? homeostasis (brain receptors send a signal to the pituitary gland which releases ADH hormone) 19 of 22 what does ADH do? it affects how much water is reabsorbed into the blood - of it is detected by the kidneys, the kidneys remove water from blood. 20 of 22 how do the kidneys balance water levels? if there is too much water, lots of dilute urine is produced. if there is too little water, concentrated urine is produced. 21 of 22 how is salt removed from the blood? lots of dilute urine is produced 22 of 22
Comments
Report