Respiratory Physiology

Front 1

Describe the conducting zone and its main function

Back 1

consist of the trachea and the first generation of branches that have three main functions
to warm and humidify inspired air
2. distribute air evenly to deeper parts of the lungs
to serve as the bodys defense system

Front 2

describe the respiratory zone

Back 2

entirely made up of alveolar ducts and alveoli with extensive massive networks of capallaries surrounding each alveolus

Front 3

the ventilation pump consist of what components

Back 3

the lungs the chest wall intercoastal muscles pleural lining and diaphragm

Front 4

alveolar pressure

Back 4

the pressure in the alveoli

Front 5

transmural pressure

Back 5

is the pressure difference across an airway or across the lung wall or the pressure inside the wall minus the pressure outside of the wall

Front 6

what are the two major transmural pressures involved in breathing

Back 6

transpulmonary pressure - pressure difference across the lungs
Pl= Pa-Ppl at rest 5 cm H20 this pressure is responsible for inflating the lungs and keeping from collapsing
2. transairway pressure (pta=paw-ppl) airway- pleural

Front 7

Explain airflow during inspiration

Back 7

Inspiratory muscles contract
Thoracic cavity expands
pleural pressure becomes more negative
transpulmonary pressure increase
lungs inflate
alverolar becomes subatmospheric
air flows into the lungs until alveolar pressure equals atmospheric pressure

Front 8

Disensibility

Back 8

is the term applied to the ease with which the lungs can be stretched or inflated

Front 9

stiffness

Back 9

is defined to the resistance to stretch or to inflation

Front 10

Elastic recoil

Back 10

is defined as the ability of a stretched or inflated lung to return to its resting

Front 11

pulmonary surfactant

Back 11

lowers surface tension at the gas liquid interfacebut also changes surface tension with changes in alveolar diameter