Human Health and physiology

Question 1

what is the effect of osteoposrosis

Answer 1

bones fragile weak
brittle
less dense
less supportive

Question 2

what are the first two stages of labour

Answer 2

the uterus contracts
cervix dilates
baby is pushed out through the vagina

Question 3

what effect does alcohol have on a baby

Answer 3

fetal development system

miscarriage

Question 4

why are populations of resistant strains od bacteria becoming more common

Answer 4

over use of antibiotics
non resistan strain killed
less competition between non-resistant and resistant straisn

Question 5

what is the principle fo homeopathy

Answer 5

if large doses can cuase then smaller doses can cure

Question 6

how are white blood cells adapted to absorb white blood cells

Answer 6

ability to move
detect stimulus
change shape

Question 7

how did Richard doll carry out the link between smoking and lung cancer

Answer 7

observed large number of people
correlated the incidence of lung cancer and the amount smoking
compared smokers to non smokers

Question 8

how does the body measure temperature

Answer 8

thermogulatopry centre

skin

Question 9

why are cancer tumours hot

Answer 9

divide rapidly

therefore high rate of respiration

Question 10

what were the methods of banting and best

Answer 10

tied pancreatic ducts
enzyme producing cells wither
extract from remaining cells
inject into diabetic dogs

Question 11

how does temperature effect an enzyme

Answer 11

increases the amount of energy that the molecules have

Question 12

why can a pulse be detected in an artery and not a vein

Answer 12

artery carries blood away
blood pressure at high pressure
pulse is caused by heart beat and waves of contraction

Question 13

what happen when you put a cell in pure water

Answer 13

increases in volume

bursts

Question 14

what happens when you put a cell in sugar solution

Answer 14

decreases in volume

shiverls up

Question 15

why does a cell burst in pure water

Answer 15

water enters
by osmosis
membrane breals

Question 16

what does antagonistic mean

Answer 16

when one muscle contracts the other relaxes

a muscle can only move a bone in one way

Question 17

what is the job of the synovial fluid

Answer 17

lubricates

shock absorber

Question 18

what is a mutation

what is cancer

Answer 18

abnormal cell division

a change in DNA

Question 19

what causes cancer

Answer 19

uv
x rays
gamma rays

Question 20

what is a recessive allele

Answer 20

a form of gene

needs 2 copies to be expressed

Question 21

which contratcs to strgighten

Answer 21

extensor

Question 22

which contracts to ben

Answer 22

flexor

Question 23

benefits of breast feeding

Answer 23

contains all nutriets babies needs
contains antibodies
less likely to become obese

Question 24

how do you show protein

Answer 24

grind it up
put in burets solution
turn lilac

Question 25

how does reducing cholesterol maintain a healthy heart

Answer 25

causes atheroma
narrows arteries
avoids heart attack

Question 26

what is a reflex action

Answer 26

an response to a stimuli that is automatic

Question 27

how does the iris reduce the light entering the eye

Answer 27

the muscle contractws reducing the size of the pupil

Question 28

what causes lung caner

Answer 28

chemicals from the smoke are more conenctrated in the lungs,
enter lungs first

Question 29

how does cancer get to other area

Answer 29

the chemicals are carried by the blood

Question 30

what is a pathogen

Answer 30

a microorganism that causes disease

Question 31

how does a scab form

Answer 31

enzyme
fibrogen to fibrin
meshwork fibres
blood cells trapped

Question 32

why do antibodies only fit one area

Answer 32

specific shape

fits only one type on antigen

Question 33

how does dialysis work

Answer 33

blood flows between partially permeable memebrane 
ideal concentration 
2 things leave the blood 
by diffusion 
until balanced