B1 Fitness and Health

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What does your circulatory system carry in your blood to all your body's cells?
oxygen and glucose
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Why does circulatory system carry oxygen and glucose in your blood to all your body's cells?
so that energy can be released by aerobic respiration
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Why does the heart relax?
to fill with blood
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Why does your heart contract?
to squeeze the blood out into the arteries
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What happens when the heart contracts?
the blood is put under pressure and is sent to the arteries
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Why is it vital that the blood is put under pressure and is sent to the arteries?
to ensure that the blood reaches all parts of the body supplying the cells with glucose and oxygen for respiration
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What is the surge of blood when the heart contracts?
the heart beat or pulse
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Where is blood always under pressure?
in the arteries
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What is blood pressure a measure of?
the force of blood per unit area as it flows through the arteries
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what is blood pressure measured in?
mm Hg (millimeters of mercury)
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What does the first number of blood pressure represent?
Systolic blood pressure
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What does the second number of blood pressure represent?
Diastolic blood pressure
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What is systolic blood pressure?
the pressure in your arteries when your heart contracts (when bp is at its highest)
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What is diastolic blood pressure?
is the pressure in your arteries when your heart relaxes
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What is 'normal' blood pressure?
120/80 mm Hg
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What can blood pressure be affected by?
age and lifestyle
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How can you reduce high blood pressure?
by doing regular aerobic exercise to strengthen the heart and a healthy diet helps to keep a steady weight
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what are five factors that can lead to high blood pressure?
excess weight, high stress levels, excess alcohol, a diet high in sat fat, sugar or salt, smoking
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How does excess weight give you a higher blood pressure?
the circulatory system has to work harder to pump blood around the body of someone who is overweight
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How does sat fat give you a higher blood pressure?
too much can lead to a build up of cholesterol in the arteries forming plaques. The plaque bulges into the lumen, restricting or blocking blood flow through the arteries - increasing the risk of a heart attack
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How does smoking give you a higher blood pressure?
the carbon monoxide produced reduces the oxygen-carrying capacity of the blood so the heart rate and pressure increases in order to compensate
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What does nicotine do to the heart rate?
increases it
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where does carbon monoxide take the place of oxygen therefore reducing the oxygen-carrying capacity of the blood?
haemoglobin
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Why in the long-term is high blood pressure dangerous?
the blood vessels can weaken and eventually burst
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What happens if a blood vessel bursts in the brain?
brain damage or a stroke
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What happens if a blood vessel bursts in the kidney?
could lead to kidney damage
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What does low blood pressure mean?
means that the blood doesn't circulate efficiently, so some parts of the body are deprived of glucose and oxygen
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What can low blood pressure lead to?
dizziness, fainting, cold hands and feet. If pressure drops in the kidney it could lead to kidney failure
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What are four factors that increases the risk of heart disease?
high bp, smoking, too much salt, high fat diets
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Why are high fat diets and high cholesterol likely to cause heart attacks?
because they can blood arteries
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When are heart attacks more likely?
with narrowed coronary arteries and thrombosis
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What does being healthy mean?
being free from infection
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what does being fit relate to?
how much physical activity you're capable of doing and how quickly your body can recover afterwards
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what are five different types of fitness which are all measurable?
strength, stamina, flexibility, agility and speed
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What is cardiovascular efficiency?
how well your heart copes with aerobic respiration and how quickly it recovers afterwards
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what is cardiovascular efficiency often used as a measure of?
general fitness
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Who's heart rate is likely to recover quicker after exercise?
a fitter persons
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during exercise what will a fit persons heart rate be?
a lot lower than a less fit person
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What is the best way to measure someones overall fitness?
with a combination of exercises measuring all five aspects
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Other cards in this set

Card 2

Front

Why does circulatory system carry oxygen and glucose in your blood to all your body's cells?

Back

so that energy can be released by aerobic respiration

Card 3

Front

Why does the heart relax?

Back

Preview of the front of card 3

Card 4

Front

Why does your heart contract?

Back

Preview of the front of card 4

Card 5

Front

What happens when the heart contracts?

Back

Preview of the front of card 5
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