Science and Human Endevour

Question 1

Identify two potential of lung infections that can affect gas exchange in the lungs

Answer 1

Tuberculosis and pneumonia

Question 2

Emphysema is a disease that occurs as the result of long-term exposure to particles That irritate the lungs during inspiration outlines what occurs to the lungs when someone suffers from Emphysema

Answer 2

• there are particles cause damage to the alveoli as a result they lose elasticity and replaced with fibrous tissue or may breakdown
• because of the loss of elasticities the lungs are constantly inflated and breathing no longer occurs passively meaning it will require voluntary effort
• You will suffer from and in adequate surface area for gas to be exchanged at the alveoli and struggle valentine lighting in the lungs

Question 3

what is a system dysfunction and what is the cause and effect

Answer 3

• when a non voluntary body function is not working

cause
the result of other diseases eg diabetes cancer and Parkinson’s

effect
low bp, being bloted and nausea

treatment
watch your salt in take and diet

Question 4

explain the following cardiovascular diseases angina, atherosclerosis, heart attack and hypertension

Answer 4

angina is reduced blood flow to the heart and causes dizziness and shortness of breath

atherosclerosis: is a build up off fats and cholesterol in the the artery’s blocking blood flow and there are no symptoms until it causes a heart attack or stroke

heart attack the blood flow being restricted by cholesterol and this can cause tightness in the chests and shortness of breath and it can be cured by lowering cholesterol levels and not smocking

hypertension is low blood pressure caused by dehydration and systole and diastole pressures it can cause dizziness or death

Question 5

explain the respiratory disease emphysema and asthma

Answer 5

emphysema: is caused by Tabaco and smoke and causes detrition of the alveoli it is having damaged alveoli and ruptured air sacks it causes shortness of breath and chest tightness
asthma: is the narrowing or swelling of the air way which causes an increase off of mucos production which can cause a shortness of breath and wheezing an inhaler can help with these symptom’s

Question 6

How can an investigation be improved

Answer 6

-repeat with many ample sizes
-extend investigation over longer time period
-each group having a similar range of the skill
There amounts of food and drink the same
-record at different times of the day

Question 7

What is it called when there are two experiment groups in an investigation

Answer 7

control and experimental groups