Flashcards in Respiratory System Deck (25):
What are the primary functions of respiration?
Eliminate the CO2
What are the parts of the Stage 1?
Ventilation: exchange of air between atmosphere and alveoli and bulk flow
Exchange of O2 and CO2 between alveolar air and blood in lungs capillaries by diffusion
Transport of O2 and CO2 through pulmonary and systemic circulation by bulk flow
Exchange of O2 and CO2 between blood in tissue capillaries and cells in tissues by diffusion
What is stage 2?
Cellular utilization of O2 and production of CO2
What are the two subdivisions of the respiratory system?
Which zone brings air into and out of the lungs?
Which zone is lined with alveoli where gas exchange occurs?
T:F The trachea and larger bronchioles are rigid muscular tubes enriched by a series of cartilaginous rings that prevent compression of the tubes.
The trachea and larger bronchioles are rigid NON-muscular tubes enriched by a series of cartilaginous rings that prevent compression of the tubes.
What is unique about the smaller bronchioles in comparison to larger bronchioles?
They have no cartilage to hold them open. Their walls contain smooth muscle.
In the conducting zone the sympathetic adrenergic neurons activate?
Beta 2 receptors on bronchial smooth muscle -> relaxation and dilation of the airways, increasing airflow
In the conducting zone the parasympathetic cholinergic neurons activate?
Muscarinic receptors-> contraction and constriction of the airways, decreasing airflow
In the respiratory zone the respiratory bronchioles consist of?
Alveoli occasionally bud off their walls
Have limited ability for gas exchange
In the respiratory zone the alveolar ducts consist of?
Contain little smooth muscle
From the arise alveolar sacs and alveoli
In the respiratory zone the alveolar sacs consist of?
Alveolar ducts terminate in alveolar sacs
Two or more alveoli that share a common opening
In the respiratory zone the alveoli consist of?
Pouch-like evaginations of the wall of the respiratory bronchioles, the alveolar ducts and the alveolar sacs
How can exchange of O2 and CO2 between alveolar gas and pulmonary capillary blood happen rapidly and efficiently?
Because the walls of the alveolar are thin and have large surface area for diffusion.
What do type II alveolar cells do?
Synthesize pulmonary surfactant necessary for reduction of surface tension of alveoli
What separates the thoracic cavity form the abdomen?
What is the thoracic cavity comprised of?
Several pairs of ribs
Intercostal muscles between the ribs
What separates each lung form the thoracic wall and other surrounding structures is?
A double-walled closed sac called the Pleural Sac
The pressure exerted by a particular gas is directly
Proportional to the percentage of that gas in the total air mixture
Pulmonary Ventilation is?
Inhale and exhale air
Increase the volume of the thoracic cavity and expand the lungs
What are the muscle involved in quiet inspiration?
Diaphragm and the external intercoastals
Control of respiration is?
Involuntary and influenced by blood carbon dioxide levels