B2.3 What factors increase the risk of heart disease

HideShow resource information
  • Created by: sofsdvds
  • Created on: 12-04-16 17:24
Why is the heart a double pump?
The heart is a double pump because the right side pumps deoxygenated blood to the lungs to collect oxygen and the left side pumps oxygenated blood around the body.
1 of 17
Why do heart muscle cells need their own blood supply?
Blood supplies heart muscle cells with oxygen and nutrients to keep it beating continually.
2 of 17
Describe the function and the structure of the arteries
Arteries carry blood away from the heart. Artery walls are thick, strong and elastic because of the high blood pressure.
3 of 17
Describe the function and the structure of the veins
Veins carry blood back to the heart. Veins have thin walls, with a bigger lumen and valves to prevent backflow
4 of 17
Describe the function and the structure of the capillaries
Capillaries are small and close to cells. They have permeable walls which are only one cell thick
5 of 17
How is heart rate measured?
Heart rate (measured in beats per minute) can be measured by measuring pulse rate (number of times artery pulsates in one minute).
6 of 17
Describe blood pressure measurements
A blood pressure measurement is given as two numbers, the higher value when the heart is contracting and the lower value when the heart is relaxed
7 of 17
Why are ‘normal’ measurements given within a range for factors such as heart rate and blood pressure?
‘Normal’ measurements for factors such as heart rate and blood pressure are given within a range because individuals vary
8 of 17
How does a heart attack happen?
1. High blood pressure damages artery lining. 2. Fatty deposits build up in damaged areas and restrict blood flow increasing blood pressure. 3. A blood clot forms which blocks coronary artery, stopping blood flow to heart muscle causing heart attack
9 of 17
What two factors can cause heart disease?
Heart disease is usually caused by lifestyle factors and/or genetic factors
10 of 17
What lifestyle factors that can increase the risk of heart disease?
Poor diet, stress, cigarette smoking and misuse of drugs
11 of 17
What reduces the risk of developing heart disease?
Regular moderate exercise reduces the risk of developing heart disease
12 of 17
Compare the prevalence of heart disease in the UK with non-industrialised countries
Heart disease is more common in industrialised countries (e.g. UK) than in non-industrialised countries due to differences in lifestyle factors e.g. poor diet, stress, cigarette smoking and misuse of drugs
13 of 17
How are factors that can increase the risk of heart disease identified?
Factors that can increase the risk of heart disease are identified via epidemiological and large scale genetics studies
14 of 17
What increases the risk of heart disease?
High blood pressure increases the risk of heart disease
15 of 17
How does alcohol affect blood pressure?
Too much alcohol increases blood pressure which increases the risk of heart disease.
16 of 17
How do drugs affect blood pressure?
Drugs (e.g. ecstasy, cannabis and nicotine) increases heart rate which blood pressure causing an increased risk of heart disease.
17 of 17

Other cards in this set

Card 2

Front

Why do heart muscle cells need their own blood supply?

Back

Blood supplies heart muscle cells with oxygen and nutrients to keep it beating continually.

Card 3

Front

Describe the function and the structure of the arteries

Back

Preview of the front of card 3

Card 4

Front

Describe the function and the structure of the veins

Back

Preview of the front of card 4

Card 5

Front

Describe the function and the structure of the capillaries

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 Circulation resources »