EVERYDAY SCIENCE

SCIENCE

RESPIRATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The CO2 from the tissues is brought back to the lungs by.
A
Plasma
B
Erythrocytes
C
Both plasma and erythrocytes
D
Thrombocytes
Explanation: 

Detailed explanation-1: -Once the venous blood returns to the lungs, the carbon dioxide diffuses out of the bloodstream, through the capillaries, and into the alveoli from where it is expelled, during which time oxygen simultaneously binds with hemoglobin to be carried back to the tissues.

Detailed explanation-2: -Carbon dioxide molecules are transported in the blood from body tissues to the lungs by one of three methods: dissolution directly into the blood, binding to hemoglobin, or carried as a bicarbonate ion. Several properties of carbon dioxide in the blood affect its transport.

Detailed explanation-3: -Carbon dioxide is transported in the blood from the tissue to the lungs in three ways:1 (i) dissolved in solution; (ii) buffered with water as carbonic acid; (iii) bound to proteins, particularly haemoglobin. Approximately 75% of carbon dioxide is transport in the red blood cell and 25% in the plasma.

Detailed explanation-4: -Introduction. The hemoglobin (Hb) molecule within the red blood cell (RBC) carries oxygen from the lungs to the tissues, transports carbon dioxide from tissues back to lungs, and helps maintain acid–base balance.

There is 1 question to complete.