Week 2

Question 1

Tidal volume (VT)

Answer 1

Volume of air inspired or expired per breath

Question 2

Inspiratory reserve volume (IRV)

Answer 2

Amount of air in excess of tidal inspiration that can be inspired with maximum effort

Question 3

Expiratory reserve volume (ERV)

Answer 3

Amount of air in excess of tidal exhalation that can be expired with maximum effort

Question 4

Forced vital capacity (FVC)

Answer 4

Amount of air voluntarily moved in one breath

Question 5

Forced expiratory volume (FEV)

Answer 5

How much air someone can exhale during a forced breath

Question 6

Residual lung volume (RLV)

Answer 6

The amount of air left in the lungs after a forced exhalation

Question 7

Total lung capacity (TLC)

Answer 7

Residual lung volume + Forced vital capacity

Question 8

Minute ventilation

Answer 8

Breathing frequency x Tidal colume

Question 9

Typical healthy adult at rest minute ventilation

Answer 9

500mL/breath x 12 breaths/m = 6000L air per minute

Question 10

What is dead space

Answer 10

The amount of air inspired that is not involved in gas exchange

Question 11

200ml of oxygen in a litre of blood

Question 12

oxygen + haemoglobin =

Answer 12

Oxyhaemoglobin

Question 13

What is the Bohr effect

Answer 13

decreases in blood pH results in a lower affinity of haemoglobin for oxygen

Question 14

Significance of Bohr effect

Answer 14

Allows for enhanced unloading of oxygen in metabolically active peripheral tissues such as exercising skeletal muscle

Improves oxygen delivery

Question 15

How much haemoglobin in 100ml of blood men and women

Answer 15

14-18g in men

12-16g in women

Question 16

How much oxygen can 1 gram of haemoglobin carry

Answer 16

1.34ml

Question 17

Oxygen carrying capacity average per 100ml of blood

Answer 17

16-24ml per 100ml of blood

Question 18

What is responsible for carrying carbon dioxide

Answer 18

Bicarbonate ions

Haemoglobin

Dissolved in plasma