national 4 science
DESCRIPTION
National 4 Science. Human Health Blood Pressure. Blood Pressure. Learning Intentions: What is blood pressure? How can blood pressure be measured? What can affect blood pressure? What are the effects of high blood pressure? What effects do low blood pressure have on the body?. - PowerPoint PPT PresentationTRANSCRIPT
National 4 ScienceHuman HealthBlood Pressure
Learning Intentions: What is blood pressure? How can blood pressure be measured? What can affect blood pressure? What are the effects of high blood pressure? What effects do low blood pressure have on
the body?
Blood Pressure
When the heart beats it pushes blood into the arteries at high pressure.
This pressure is called blood pressure
What is blood pressure?
How can blood pressure be measured?
• The low tech method of measuring blood pressure is:• Stethoscope and
mercury manometer
• The high tech method of measuring blood pressure is:• Digital
sphygmomanometer
When measuring blood pressure there are two numbers
E.g. Average blood pressure is 120/80mmHg
The high number is caused when the heart contracts pushing blood into the arteries
The low number is when the heart relaxes allowing the chambers of the heart to refill
Measuring blood pressure
Position Blood pressure (mmHg)
Sitting quietly
After exercise
Measure your blood pressure
Answer the following questions:1. What effect did exercise have on your blood pressure?
2. If we wanted to make the test more reliable what would we have to do?
There are 6 things that can affect blood pressure
What are they? Being overweight Not taking enough exercise Eating a diet high in fat Eating a diet high in salt Drinking alcohol to excess Having a stressful lifestyle
What has an effect on your blood pressure?
High blood pressure can lead to: Heart attack – damage to heart muscle caused
by a blockage to blood vessel supplying oxygen to the heart
Angina – intense cramp like pain in the chest indicating heart not getting enough oxygen. Goes away with rest
Stroke – blockage of a blood vessel in the brain, may result in brain damage
What effect does high blood pressure have on your body?
Low blood pressure can result in fainting and may indicate heart failure
What effect does low blood pressure have on the body?
1. What is blood pressure?2. How can blood pressure be measured?3. What can affect blood pressure?4. What are the effects of high blood pressure?5. What effects do low blood pressure have on the body?
Quiz