10 Questions
What can happen if there is not enough oxygen for your cells?
Cells can start to die
Why do blood vessels in the cardiovascular disease become narrower?
Due to a fatty substance buildup
What can occur if blood vessels in your skin narrow due to cold temperatures?
Less blood reaches the cells
What might happen if the blood supply in cardiovascular disease is reduced?
Development of heart attack
In what condition can poor gas exchange in the lungs cause significant health problems?
Cardiovascular disease
How does light travel compared to sound?
Light travels faster than sound.
Why do you see flashes before you hear bangs in an explosion?
Light travels faster than sound, so you see the light first.
What happens when light reaches an opaque material?
Some light is reflected and some is absorbed.
Which type of material allows light to pass through but scatters the rays in different directions?
Translucent material
How can energy be transferred from an exploding firework to the audience?
By light and sound
Learn about the consequences of reduced oxygen supply to cells due to narrowed blood vessels, poisons, and poor gas exchange in the lungs. Find out how frostbite can occur when blood vessels in the skin constrict in cold temperatures. Discover how cardiovascular disease and smoking can lead to the build-up of fatty substances, causing further reduction in blood flow.
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