Question

question 15
1 pts
internal respiration can be defined as:
the exchange of gases between the lung and the blood capillaries in the lung.
pulmonary ventilation.
the exchange of gases between the blood capillaries and the tissue cells.
both a and b.
question 16
1 pts
by the time the blood leaves the lung capillaries to return to the heart, what percentage of
the bloods hemoglobin has united with oxygen?
55%
63%
82%
97%

Explanation:

Question 15

Internal respiration is the exchange of gases (oxygen and carbon dioxide) between the blood capillaries and the tissue cells. The exchange between the lung and blood capillaries is external respiration, and pulmonary ventilation is the movement of air into and out of the lungs.

By the time blood leaves the lung capillaries to return to the heart, about 97% of the blood's hemoglobin has united with oxygen. This is a standard physiological fact.

Answer:

the exchange of gases between the blood capillaries and the tissue cells.

Question 16