Flashcards in B1 - Fitness and health Deck (22):
What type of blood vessel carries blood under presser?
Which blood vessels take blood to the heart?
Why is it important for blood to reach all parts of the body?
This is because the blood carries food and oxygen to the cells all around the body.
What is fitness?
Fitness is the ability to do physical activity.
What is health?
Health is being free from disease.
Can you be healthy but not fit or fit but not healthy?
Yes, as you can be free from disease but unable to do physical activity. Alternatively, you can be capable of doing lots of physical activity but be ill.
What is blood pressure measured in?
mmHg (millimeters of mercury).
What is systolic pressure?
Systolic pressure is the maximum pressure the heart produces (when the heart contracts).
What is diastolic pressure?
Diastolic pressure is the pressure between heartbeats (when the heart relaxes).
What are the main ways of measuring fitness?
- cardiovascular efficiency
What is a stroke?
When small blood vessels burst in the brain.
What can low blood pressure lead to?
Low blood pressure can lead to:
- poor circulation
- kidney failure
How can low blood pressure cause poor blood circulation?
The blood will not be at a high enough pressure to carry the required amount of food and oxygen to muscles and other body cells.
What are the factors that increase the chance of heart disease?
- having high blood pressure
- eating lots of saturated fat
- having lots of salt
What can block an artery by sticking to its walls?
Saturated animal fats like cholesterol.
What happens when salt levels are too high?
The body retains water and so a higher volume of blood is pumped by the heart, which increases blood pressure.
How does carbon monoxide reduce the amount of oxygen carried by the blood?
It binds to the haemoglobin and prevents it from carrying as much oxygen.
What does nicotine do to the heart?
Nicotine is a stimulant and speeds up the heart which increases blood pressure.
What does the coronary artery do?
The coronary artery supplies the heart muscles with oxygen and food.
Why is it dangerous if there is a blockage in a coronary artery?
If the artery is blocked the heart muscles are not supplied with energy and can result in a heart attack.
What is a thrombosis?
A thrombosis is the clotting of blood in a blood vessel causing a blockage.