Question

When oxygen diffuses into blood and carbon dioxide diffuses out of the cell, it is called as
(a)External respiration
(b)Cellular respiration
(c)Internal respiration
(d)None of the above

Answer 1

Tissues like skeletal muscles require oxygen so as to hold out respiration by which the cells produce energy within the sort of ATP by burning food, mainly glucose. ATP is used to drive cellular functions. Cellular respiration occurs in the mitochondria.

Complete answer:
-The gas exchange between blood and the metabolic active tissue is referred to as internal respiration.
-Carbon dioxide is produced as waste during respiration. So, metabolizing cells in the tissue
have a high demand for oxygen while carbon dioxide is to be far away from the cells.
-The partial pressure of oxygen is low and that of carbon dioxide is high in the tissue. But within the blood, the partial pressure of oxygen is high which of carbon dioxide is low.

Additional Information: -The gas exchange within the lungs is mentioned as breathing.
-Oxygen-depleted blood, which is transported from metabolic active tissues, flows through the pulmonary capillaries where oxygen diffuses from the alveolar air into the blood.
-Carbon dioxide diffuses out of the blood into the alveolar air present in the lungs.
-The partial pressure of oxygen within the blood increases up to 100 mmHg.
-The partial pressure of carbon dioxide in the blood is 45 mmHg while that of the alveolar air is 40 mmHg.
-The exchange of carbon dioxide occurs from the blood into the alveolar air present in the lungs.
-Both exchanges of oxygen and carbon dioxide occur until the equilibrium of every gas is established.
-The final partial pressure of oxygen is 100 mmHg and partial pressure of carbon dioxide is 40 mmHg in the blood which leaves the lungs.
-The blood which leaves the lungs is termed as oxygen-rich blood.
-This oxygen-rich blood flows to the metabolizing tissues which responds to their high demands of oxygen.
-Both oxygen and carbon dioxide are transported through the blood by binding with haemoglobin, which is found in red blood cells.

So, the correct answer is, ‘Internal respiration.’

Note: -Dead space is the space of airways, which does not occur in the exchange of oxygen and carbon dioxide between the air and pulmonary capillary blood. It is important to differentiate between the anatomic dead space (ADS).