Alveoli and Gas Exchange

Question 1

what is the structure of alveoli

Answer 1

very tiny air sacs very thin walls and surrounded by capillaries

Question 2

describe the gas exchange from alveoli to capillaries

Answer 2

alveoli is high pressure/concentration of oxygen
capillaries surrounding alveoli are low pressure/concentration of oxygen
movement of oxygen from high pressure to low through thin walls of capillaries and alveoli
capillaries gain oxygen from the alveoli and transport it around the body

Question 3

what is gas exchange

Answer 3

gases move from high to low areas of concentration

Question 4

gas exchange capillaries to alveolis

Answer 4

capillaries surrounding alveoli have high pressure/concentration of CO2
alveoli low pressure/concentration of CO2
movement of CO2 from high to low pressure
CO2 is moved out of blood into the alveoli to be breathed out

Question 5

gas exchange can vary with the intensity of exercise so what happens during aerobic activity

Answer 5

an increase in breathing rate and an increase in gas exchange to meet the demad of the working muscles for more oxygen

Question 6

gas exchange can vary with the intensity of exercise so what happens during anaerobic activity

Answer 6

after anaerobic activity there is an elevated breathing rate allowing greater gas exchange to aid recovery