respiratory system

Question 1

what is diffusion

Answer 1

the movement of gas from an area of high concentration to an area of low concentration

Question 2

what is gaseous exchange

Answer 2

the movement of oxygen from the air into the blood, and carbon dioxide from the blood into the air.

Question 3

how is the alveoli designed to help gaseous exchange

Answer 3

-thin walls so short diffusion pathway
-good blood supply by more capilaries
-larger surface area

Question 4

tidal volume

Answer 4

volume of air breathed in or out per breath

Question 5

inspiratory reserve volume

Answer 5

volume of air that can be forcibly inspired after a normal breath

Question 6

residual volume

Answer 6

volume of air that stays in the lungs after maximum expiration

Question 7

minute ventilation

Answer 7

volume of air breathed in or out per minute

Question 8

how does smoking impact the respiratory system

Answer 8

-irritation of the trachea
-damages the cilia that help push mucus out of the lungs
-damage the alveoli=reduces the efficiency of gaseous exhange
-increases COPD
-carbon monoxide combines with haemoglobin

Question 9

formula for minute ventilation

Answer 9

number of breaths per min
x
tidal volume