Chittesh14
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Hello guys,

I came across a few questions and wasn't sure about their answers as my textbook does not have answers...

1. What puts blood under pressure?

The heart muscles out blood under pressure as it contracts and the heart beat squeezes the blood through the arteries which are under pressure.

2. How could Joe's mum avoid taking medication for high blood pressure?

She can do regular exercise to strengthen her heart muscles which will in return reduce her blood pressure or regulate it, making her need no medication.

3. Why do we eat salt when it can cause heart problems?

We need salts in our body as they contain calcium which strengthens the bones in our body.
Furthermore, they regulate electrical activity and form an electrical gradient across the membranes of the neurones do that the nerve cells (neurones) can carry information around the body.

This is what I originally wrote - "without salt! the body does not retain any water which will cause dehydration or even death in severe cases."
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rileystringer1
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(Original post by Chittesh14)
Hello guys,

I came across a few questions and wasn't sure about their answers as my textbook does not have answers...

1. What puts blood under pressure?

The heart muscles out blood under pressure as it contracts and the heart beat squeezes the blood through the arteries which are under pressure.

2. How could Joe's mum avoid taking medication for high blood pressure?

She can do regular exercise to strengthen her heart muscles which will in return reduce her blood pressure or regulate it, making her need no medication.

3. Why do we eat salt when it can cause heart problems?

We need salts in our body as they contain calcium which strengthens the bones in our body.
Furthermore, they regulate electrical activity and form an electrical gradient across the membranes of the neurones do that the nerve cells (neurones) can carry information around the body.

This is what I originally wrote - "without salt! the body does not retain any water which will cause dehydration or even death in severe cases."
1) Pretty much right. The left ventricle contracts forcing blood out of the aorta and through blood vessels at high pressure
2) (As well as regular exercise) Eat a healthy, balanced diet i.e. not too much saturated fat as that increases cholesterol levels which increases blood pressure
3) Don't know the importance of salts, I guess they are important also in maintaining the right water potential in blood as without them water potential would be very high, the blood would be really dilute, also I think they help prevent against oedema
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Chittesh14
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(Original post by rileystringer1)
1) Pretty much right. The left ventricle contracts forcing blood out of the aorta and through blood vessels at high pressure
2) (As well as regular exercise) Eat a healthy, balanced diet i.e. not too much saturated fat as that increases cholesterol levels which increases blood pressure
3) Don't know the importance of salts, I guess they are important also in maintaining the right water potential in blood as without them water potential would be very high, the blood would be really dilute, also I think they help prevent against oedema
Thanks buddy yeah I could've wrote saturated fat or smoking or high amounts of salt for question 2.
They all cause high blood pressure which is the overarching factor which increases the risk of developing heart disease, right? Correct me if I'm wrong :P


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rileystringer1
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(Original post by Chittesh14)
Thanks buddy yeah I could've wrote saturated fat or smoking or high amounts of salt for question 2.
They all cause high blood pressure which is the overarching factor which increases the risk of developing heart disease, right? Correct me if I'm wrong :P


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yep hypertension isnt good, if blood is moving through vessels at higher pressure theres more chance of damaging them i.e. atheroma formation which leads to things like angina, thrombosis & aneurysms
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