smoking and chd
Post on 14-Apr-2017
364 Views
Preview:
TRANSCRIPT
Home Learning
Summarise on an A4 page using a balance of text and images about a peak flow meter.1) What is a peak flow meter?2) What does it tell you about your lungs?3) In what circumstances is it used by doctors?
Spirometer• Tidal Volume
• Inspiratory reserve volume
• Expiratory reserve volume
• Vital capacity
• Residual volume
• Total lung capacity
Tidal Volume
• Amount of air moving in and out of the lungs during breathing at rest
• Approximately 0.5dm3
(at 12 breaths per minute)
Inspiratory Reserve Volume• How much EXTRA air
can you breath in during forced inspiration
• Measures inspiratory capacity ABOVE the tidal volume
• Uses extra muscles
Expiratory Reserve Volume• How much EXTRA air
can you breath out during forced exspiration
• Measures exspiratory capacity BEYOND the tidal volume
• Uses different muscles
Residual Volume
• Volume remaining in the lungs even after maximum expiration
• Approximately 1.5dm3
Vital Capacity
• Largest possible volume change in the lungs (i.e. from max. inspiration to max. expiration)
• Approximately 5dm3
Total Lung Capacity
• EVERYTHING
• Includes Vital Capacity (the useful volume of air in the lungs) ANDthe Residual Volume (the dead space)
What are we learning about today?
Stand (supported) on one leg, and raise yourselves repeatedly on your standing leg
What do you think this feels like???
BHF ‘legacy’ advert
May 2, 2023
Coronary Heart Disease
Learning objectives• Understand the biological consequences of
smoking in relation to the lungs and the circulatory system, including coronary heart disease– Why does the heart needs its own blood supply?– What causes a heart attack?– How likely are people to have heart attacks?
Smoking
Why is smoking a problem?
It’s bad for your health
Smoking Demonstration
• Why does smoking decrease the vital capacity of the lungs?
• Which chemical caused the cotton wool to go yellow? What effect would this have to gaseous exchange?
• What happened to the indicator? What effect would this have to enzymes and tissues in the lungs?
Effect of smoking on blood vessels - advert
True
False
TrueTrue
TrueFalse
True
False
False
True
Quick Quiz
• Heart attacks are common in the UK and other industrialized
countries.
• Only men have heart attacks.
• Young people don’t have heart attacks.
• Smoking increases your risk of heart attack.
• Heart attacks happen when arteries to the heart are blocked.
• Heart attacks are always fatal.
• When you have a heart attack, some of your muscle dies.
• Heart muscle dies when it doesn’t get oxygen.
• Any fat in your diet is harmful.
• Being overweight puts a strain on your heart.
What does this graph show?
State
DescribeInterpret
Highlight key pointsUse the pattern to
Explain why
MYOCARDIAL INFARCTION
‘Heart Attack’
Myocardium = the heart muscle
Infarction = tissue death due to oxygen starvation
Fatty deposits build up in arteries, causing a blood clot.
The blood cannot flow through the artery and oxygen cannot get to the cells
Cells have no oxygen and begin to dieAs the heart begins to
die, pain is felt
SYMPTOMS
Heart Attack Symptoms
Chest Pains
Discomfort
Sweating
Weakness
Vomiting
Look at the case study in pairs.Identify:
1. The factors that increase the person’s risk of heart disease
2. The factors that the person can change and the factors that they can’t
3. For the factors they can change, how could this reduce their risk of heart disease?
Imagine you are meeting with this person to discuss their risks of getting heart disease.
Write a role play to show what you would tell them and how they might respond.- Remember to link the changes back to the causes of heart disease and explain why it would work.
Changing Lifestyles
BMI Index
below 18.5 underweight18.5 – 24.9 normal25.0 – 29.9 overweight
30+ obese
Fact File
top related