Respiration

Question 1

What are the most important expiratory muscles?

Answer 1

abdomen

Question 2

What intercostal muscles are used during inspiration?

Answer 2

External intercostals

Question 3

what intercostal muscles are used during expiration?

Answer 3

Internal intercostals

Question 4

Is the lung usually always more inflated or less inflated than the intrinsic equilibrium position?

Answer 4

usually more inflated which means that the lung is always trying to deflate

Question 5

Is the chest wall more or less inflated than the intrinsic equilibrium position?

Answer 5

less inflated so therefore wants to expand

Question 6

What creates the resting negative intrapleural pressure?

Answer 6

opposing forces of chest wall wanting to expand and lung wanting to deflate

Question 7

What determines the direction of air flow?

Answer 7

pressure difference between the lung and the mouth

Question 8

What is the equation for transpulmonary pressure (PTp)

Answer 8

PTp = PL-PIp

Question 9

Between PIp and PTp, which becomes negative faster?

Answer 9

PIp

Question 10

What is elastic recoil pressure?

Answer 10

Inherent movement back to intrinsic equilibrium forcing air out