Gaseous exchange

HideShow resource information
  • Created by: emmajane_
  • Created on: 12-05-14 18:55
How does a manual ventilator work?
A mast atached to a bag is placed over mouth. Bag squeezed, pushing air into lungs
1 of 9
What are the two types of mechanical ventilators?
Negative pressure machines and positive pressure machines
2 of 9
When is a negative ventilator used?
In cases of paralysis
3 of 9
How does a negative pressure ventilator work?
Patients thorax is contained inside a metal box that can create low pressure outside the lungs. This causes thorax to expand so air enters the lungs
4 of 9
How does a positive pressure ventilator work?
Attach by a tube and mask to mouth and nose. Air enters lungs under high pressure
5 of 9
When is a positive pressure ventilator used?
During surgery or when patient is unconcience
6 of 9
What type of surface helps oxygen to dessolve so that it can diffuse into cells?
A moist surface
7 of 9
How is the concentration gradient maintained by?
1. Blood removing oxygen from and bring CO2 to the lungs
8 of 9
Why are capillaries so close to the alveoli?
So the gas has a shorter distance to diffuce
9 of 9

Other cards in this set

Card 2

Front

What are the two types of mechanical ventilators?

Back

Negative pressure machines and positive pressure machines

Card 3

Front

When is a negative ventilator used?

Back

Preview of the front of card 3

Card 4

Front

How does a negative pressure ventilator work?

Back

Preview of the front of card 4

Card 5

Front

How does a positive pressure ventilator work?

Back

Preview of the front of card 5
View more cards

Comments

No comments have yet been made

Similar Biology resources:

See all Biology resources »See all Gaseous exchange resources »