Heart gcse

Question 1

what is a stent? + their benefits and drawbacks

Answer 1

An expandible tube that is placed inside arteries to keep them open so blood can keep flowing
benefits= surgery is quick, last a long time
disadvantages= requires surgery, which always has risks, patient can develop blood clots near stent(thrombosis)

Question 2

what is a statin?+ benefits and drawbacks

Answer 2

A medication that alters the balance of cholesterol by decreasing bad type of cholesterol (LDL) and increase good type of cholesterol (HDL), which lowers risk of coronary heart disease.
benefits=lowers risk of heart diseases, no surgery is required
drawbacks= has to be taken regularly, has side effects like head aches and kidney failure.

Question 3

what is the role of valves?

Answer 3

to allow blood to flow in one direction

Question 4

what are the problems we can get with valves?

Answer 4

.not enough blood can pass through because valve wont open fully (became stiff)
. blood can not close fully so blood can leak backwards

Question 5

what is a pace maker and where is it located?

Answer 5

produce small electrical impulses which spread through the muscular walls of the heart causing them to contract
.located in the right atrium

Question 6

what is an artery?

Answer 6

Any vessel that carries blood away from the heart(oxygenated blood from heart to body)

Question 7

what is a vein?

Answer 7

any vessel that carries blood to the heart

Question 8

How does the heart get its own oxygen to function?

Answer 8

Through coronary arteries, which circles the heart making sure that all the muscle tissue gets all the oxygen and nutrients that it needs.

Question 9

what is a capillary?

Answer 9

these are involved in the exchange of materials at the tissues.