Quiz 8 Respiratory System

The respiratory pathway with air except the alveoli is called:

...

How is the carbon dioxide transported in blood

7% dissolve in plasma 23% in combination with Hb as carbaminohemoglobin in RBCs 70% combines with water in RBCs to form carbonic acid

What happens when the pleural space is opened to atmospheric air, either by surgery or from trauma?

The intra-thoracic negative pressure is destroyed and lungs collapse

The most significant humero-chemical factors in regulating respiration, in order from most important, are:

arterial PCO2, [H+], and PO2

An increase in partial pressure of carbon dioxide (PCO2) of arterial blood reaching respiratory centers in brain causes:

increase in respiration rate

The partial pressure of oxygen is highest in:

lung alveoli

The volume of air inspired or expired during normal respiration is:

tidal volume

During inspiration:

diaphragm contracts, increasing volume of thoracic cavity

The difficult breathing is termed as:

dyspnea

What is the function of the inspiratory center in the medulla?

pacemaker function, initiates an inspiration spontaneously