AS Biology AQA- Heart Disease

?
  • Created by: Ruth ****
  • Created on: 16-05-13 08:48
What does an atheroma start off as?
Fatty streaks which are accumulations of white blood cells containing low-density lipoproteins (LDL's). These then enlarge to form an atheromatous plaque.
1 of 11
What is an atheromatous plaque and where is it found?
Enlarged fatty streak containing fibres, cholesterol and dead muscle cells. They will bulge into the lumen of an artery, reducing the blood flow.
2 of 11
What two conditions can an atheroma lead to?
Thrombosis and an aneurysm
3 of 11
Thrombosis or a thrombus is also commonly known as...?
A blood clot
4 of 11
What will break through the lining of a blood vessel, interrupting the otherwise smooth flow of blood, forming and thrombus?
An atheroma
5 of 11
A thrombus will block the blood vessel, preventing blood supply to the tissues beyond it. What affect does this have?
Surrounding tissues dies as a result of lack of oxygen, glucose and other nutrients the blood supplies.
6 of 11
Aneurysms form from a weakened wall which in turn produces a balloon-like, blood filled structure. What can happen to these balloon, blood filed structures?
It may burst, causing a haemorrhage and loss of blood to the area supplied by that artery. In the brain, this is known as a stroke.
7 of 11
Name one risk factor which can increase the chances of CHD?
Carbon monoxide- combines with haemoglobin to form carboxyhaemoglobin. Therefore the oxygen carrying capacity of the blood reduces and the heart has to work much harder. During exercise, the heart may not receive enough oxygen- ANGINA.
8 of 11
Name another risk factor which can increase the chances of CHD?
Nicotine- Increases production of adrenaline which increases heart rate and blood pressure. It also makes red blood cells more sticky, leading to thrombosis etc
9 of 11
High blood pressure is another increasing risk factor of CHD, what happens to the arteries because of it?
There is a higher pressure in the arteries, therefore developing an aneurysm is more likely, and walls tend to thicken and harden, restricting blood flow.
10 of 11
Blood cholesterol is carried in blood plasma as one of two types, what are theses?
High-density lipoproteins (LDL'S) which remove cholesterol from tissues and transport it to the liver where it is discarded, and Low-density lipoproteins (LDL'S) which transport cholesterol from the liver to the tissue :(
11 of 11

Other cards in this set

Card 2

Front

What is an atheromatous plaque and where is it found?

Back

Enlarged fatty streak containing fibres, cholesterol and dead muscle cells. They will bulge into the lumen of an artery, reducing the blood flow.

Card 3

Front

What two conditions can an atheroma lead to?

Back

Preview of the front of card 3

Card 4

Front

Thrombosis or a thrombus is also commonly known as...?

Back

Preview of the front of card 4

Card 5

Front

What will break through the lining of a blood vessel, interrupting the otherwise smooth flow of blood, forming and thrombus?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Health, illness and disease resources »