Flashcards
GCSE OCR Gateway Core Science: B1a (Foundation)
Cards in this deck (10)
- 1Why is blood in arteries under pressure?1. Because of contraction of heart muscles
2. So that it reaches all parts of the body - 2What are the factors that increase the risk of developing heart disease?1. High blood pressure
2. Smoking
3. Eating high levels of salt
4. Eating high levels of saturated fat - 3How does cholesterol restrict or block blood flow in arteries?Eating high levels of saturated fat leads to a build up of cholesterol (plaque) in the arteries: you do need some cholesterol for the making of the cell membrane, but, too much can restrict or block blood flow, so the oxygen supply to the heart is limited
- 4What do blood pressure measurements consist of?The systolic (lowest pressure) and diastolic (highest pressure) data in mmHg (millimetres of mercury). The systolic data is the number on top and the diastolic data is the number at the bottom
- 5What are the factors that increase blood pressure?1. Being overweight
2. Stress
3. Drinking too much alcohol
4. Smoking - 6What factors decrease blood pressure?1. Balanced diet
2. Regular exercise - 7What is the difference between fitness and health?Fitness is the ability to perform physical tasks whereas health is the state being free from disease and infections
- 8How can fitness be measured in different ways?1. Strength
2. Stamina
3. Flexibility (range of movement)
4. Agility
5. Speed
6. Cardiovascular efficiency (having an efficient heart and normal blood pressure)
To measure some of these, you'll need specialist equipment (e.g. blood pressure monitors) - 9How does smoking increase blood pressure?1. Carbon monoxide reduces the oxygen-carrying capacity of the blood so heart rate increases to compensate
2. Nicotine increases the heart rate - 10How can diet increase the risk of heart disease?1. Saturated fats leading to a build up of cholesterol (plaque) in arteries
2. High levels of salt raise blood pressure because it retains water
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- FULLY follows the specification :) BUT NOT suitable for the students who will sit their GCSE exams in 2018 and onwards :(
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- Alija Shahi
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