Lungs / Health Issues

Question 1

what happens during gaseous exchange in the lungs

Answer 1

oxygen transferred to blood stream for respiration and carbon dioxide transferred out of the blood to remove waste products

Question 2

where in the lungs does gaseous exchange take place

Answer 2

alveoli

Question 3

what surrounds the alveoli and why

Answer 3

capillaries to maintain a good blood supply which maintains the concentration gradient

Question 4

define health

Answer 4

state of physical and mental well-being

Question 5

define risk factor

Answer 5

any attribute that increases likelihood of developing a disease

Question 6

what is the difference between a benign tumour and a malignant tumour

Answer 6

benign tumours are not cancerous so they don’t spread around the body
malignant tumours are cancerous and spread through the blood

Question 7

what is the difference between the cell cycle of a healthy cell and the cell cycle of a cancerous cell

Answer 7

healthy cell cycles safe controlled and replicate DNA then dies
cancerous cell cycles are uncontrolled and a result of genetic mutation and doesn’t die

Question 8

how do secondary tumours occur

Answer 8

secondary tumours occur through metastasis where a cancer cell breaks away from the original cancer cell, travels through the blood and forms new tumour