I: Mechanics of Pulmonary Ventilation

Question 1

Diaphragm innervated by

Answer 1

Phrenic nerve

Question 2

What increases costophrenic volume

Answer 2

Contraction of diaphragm

Question 3

Normal widening of thoracic cage (cm) vs forces inspiration

Answer 3

Normal 1 cm

Forces inspiration 10cm

Question 4

Inspiration is an active or passive process

Answer 4

Active

Question 5

Paralysis of one of the phrenic nerves (which innervated each side of the diaphragm) causes

Answer 5

Not equal movement of diagraphm, one ascends and one descends

Question 6

Anteroposterior diameter of rib cage increased by

Answer 6

External intercostal muscles

Question 7

Use of accessory muscles when

Answer 7

Assistance is required, not normal inspiration

Question 8

Expiration is an active or passive process

Answer 8

Passive

Question 9

Which muscles are used during forced expiration

Answer 9

Abdominal muscles

Question 10

Internal vs external intercostal muscles in size of anteroposterior diameter

Answer 10

Internal intercostal muscles decrease it

External intercostal muscles increase it