Respiratory System

Question 1

How is gas transported?

Answer 1

Blood- 45% cells, 55% plasma.
O2 is transported in 2 ways:
- 97% carried within haemoglobin in RBC’s
-3% is dissolved in plasma
CO2 is transported in 3 ways:
- 70% is dissolved in water as carbonic acid
- 23% is carried in haemoglobin
- 7% is dissolved in plasma

Question 1

Structure of Alveoli?

Answer 1

One cell thick- short diffusion pathway
Extensive capillary network- excellent blood supply
Large Surface Area- greater uptake of O2

Question 1

What is alveoli responsible for?

Answer 1

The exchange of gases between the lungs and blood via diffusion

Question 2

What is Respiration and what does it include?

Answer 2

Taking O2 and removing CO2.
It includes:
- Ventilation
- External Respiration
- Transportation
- Internal Respiration
- Cellular Respiration

Question 3

What is Diffusion?

Answer 3

The movement of gas molecules from an area of high concentration to an area of low concentration

Question 4

What is Gaseous Exchange?

Answer 4

The movement of O2 from the air into the blood and of CO2 into the air

Question 5

How is O2 transported in the body?

Answer 5

97% carried within haemoglobin in RBC’s
3% is dissolved in plasma CO2

Question 6

How is CO2 transported in 3 ways?

Answer 6

70% is dissolved in water as carbonic acid
23% is carried within haemoglobin
7% is dissolved in plasma

Question 7

Tell me as much as you know about Breathing rate…

Answer 7

• the number of inspirations or expirations per minute
  -12-15 breaths per minute on average.
  -Exercise intensity increases and a max of 50-60 breaths per minute

Question 8

Tell me as much as you know about Tidal Volume…

Answer 8

• the volume of air inspired or expired in 1 breaths
• average is 500
• Resting TV can depend on age, fitness and gender.
  -During exercise TV will increase.
  -