Physio 1

Question 1

Pulmonary ventilation

Answer 1

The inflow of o2 from the atmosphere to alveoli and the outflow of co2 from alveoli to the atmosphere

Question 2

Pulmonary perfusion

Answer 2

The cardiac output from the right ventricle to the lung

Question 3

Exchange of gases

Answer 3

Between pulmonary ventilation and pulmonary perfusion via
Pulmonary membrane- alveoli

Question 4

Part from the passage part of the respiratory system where there’s no gas exchange

Answer 4

Air conducting zone
Because of it’s thick wall and so it have protective function

Question 5

Air conducting zone have a cartilaginous circular ring . Why …

Answer 5

To prevent the area from collapsing

Question 6

Air conducting zone have a longitudinal elastic fibres

Answer 6

To allow lengthening and shortening of the bronchi with lung expiation and collapsing

Question 7

Muscles needed for normal inspiration process

Answer 7

Diaphragm
External intercostal muscle

Question 8

The respiratory system consists of

Answer 8

Respiratory passages- air conducting zone , respiratory zone
Respiratory muscles
Respiratory centres
Pulmonary circulation

Question 9

Diaphragm during the normal inspiration

Answer 9

It - contract - and decent 1cm
Increase vertical diameter of the chest
Decrease intra alveolar pressure
So inspiration

Question 10

The only nerve that causes death if it is effected

Answer 10

Phrenic nerve of diaphragm

Question 11

Action of external intercostal muscle

Answer 11

Normal inspiration muscle
Contraction - elevation of ribs and sternum
Increase antero posterior diameter

Question 12

Muscles of forced inspiration

Answer 12

Diaphragm
Intercostal muscle
Sternomastoid muscle
Scaleni muscle
Aelevator scapule
Erector spinae muscle

Question 13

Which muscle included in the normal expiration

Answer 13

Passive process no need for muscles