Effects of exercise on aerobic system

Question 1

What are the short term effects?

AO1

Answer 1

Inc. TV
Inc. VC
Inc. depth/rate of breathing.

Question 2

What are the effects of training?

AO1

Answer 2

Inc. SA of alveoli
Inc. cap. density
Inc. a-VO2

Question 3

Effects of smoking?

AO1

Answer 3

Decreased efficiency of resp. System to supply O2 to muscles
Carbon monoxide reduces amount of O2 absorbed into blood
Haemoglobin has greater affinity to CO than O2

Question 4

What are the effects of smoking?

AO2

Answer 4

Decreased gaseous exchange or diffusion gradient
Increased likelihood of respiratory disease
Tar coats the airways, builds in lungs and inhibits gaseous exchange
Narrowing of air passages causing an increase in respiratory resistance

Question 5

Effects of training?

AO2

Answer 5

Inc. amount of 02 diffused into blood/CO2 into alveoli
Inc. gas exchange at lung
Inc. saturation of haemoglobin with oxygen
Inc. amount of oxygen diffused into muscles
Inc. gaseous exchange at muscles
Dec. respiratory muscle fatigue
Delays OBLA (onset of blood lactate) or lactate threshold