Physiology Practical 2

Question 1

define total lung capacity

Answer 1

the volume of air contained in the lung at the end of maximal inspiration
- IRV + VT+ ERV+ RV

Question 2

define vital capacity

Answer 2

this is the amount of air that can be forced out of the lungs after a maximal inspiration
- IRV + TV+ ERV

Question 3

define forced vital capacity

Answer 3

• Measured

- the amount of air that can be forced out of the lungs after a maximal inspiration

Question 4

define tidal volume

Answer 4

the amount of air breathed in and out

Question 5

define residual volume

Answer 5

this is the amount of air left in the lungs after a maximal exhalation, it can never be expired

Question 6

define expiratory reserve volume

Answer 6

this sit aha mouth of additional air that can be pushed out after the end expiratory level of normal breathing

Question 7

define inspiratory reserve volume

Answer 7

the is the additional air that can be inhaled after a normal tidal breath in
- vital capacity -( tidal volume+ Expiratory reserve volume)

Question 8

define functional residual volume

Answer 8

this is the amount of air left in the lungs after a tidal breath out
- expiratory reserve volume + residual volume

Question 9

define inspiratory capacity

Answer 9

the maximal volume of air that can be inspired following a normal expiration
- tidal volume + inspriatiory reserve volume

Question 10

define anatomical dead space

Answer 10

this is the volume of the conducting airways - measured with a fowler method

Question 11

what does the spirometer do

Answer 11

• this is a device that measures the volume changes during breathing

Question 12

what is a vitalograph used for

Answer 12

• it is widely used in lung function clinics to measure air flow