Biology, asked by Pakiki, 5 months ago


 \huge  \overline{ \underline{\mid   \color{red} \mathfrak Question \color{black}\mid}}


Don't spam ❌
Answer not from google ❌​

Attachments:

hibaansari786: HI
hibaansari786: Will u plz
hibaansari786: INBOX
hibaansari786: me
hibaansari786: plz
hibaansari786: plzplz
hibaansari786: plz
hibaansari786: please

Answers

Answered by Anonymous
4

Transport of gases: Blood is the medium of transport for O2 and CO2. About 97% of O2 is transported by RBCs in the blood. The remaining 3% of O2 is carried in a dissolved state through the plasma. Nearly 20-25% of CO2 is transported by RBCs whereas 70% of it is carried as bicarbonate. About 7% of CO2 is carried in a dissolved state through plasma.

Transport of oxygen: Haemoglobin is a red coloured iron containing pigment present in the RBCs. O2 can bind with haemoglobin in a reversible manner to form oxyhaemoglobin. Each haemoglobin molecule can carry a maximum of four molecules of O2. Binding of oxygen with haemoglobin is primarily related to partial pressure of O2. Partial pressure of CO2, hydrogen ion concentration and temperature are the other factors which can interfere with this binding. A sigmoid curve is obtained when percentage saturation of haemoglobin with 02 is plotted against the pO2. This curve is called the Oxygen dissociation curve and is highly useful in studying the effect of factors like pCO2, H+ concentration, etc., on binding of O2 with haemoglobin. In the alveoli, where there is high pO2, low pCO2, lesser H+ concentration and lower temperature, the factors are all favourable for the formation of oxyhaemoglobin, whereas in the tissues, where low pO2, high pCO2, high H+ concentration and higher temperature exist, the conditions are favourable for dissociation of oxygen from the oxyhaemoglobin. This clearly indicates that O2 gets bound to haemoglobin in the lung surface and gets dissociated at the tissues. Every 100 mL of oxygenated blood can deliver around 5 mL of O2 to the tissues under normal physiological conditions.

Transport of carbon dioxide: CO2 is carried by haemoglobin as carbamino-haemoglobin (about 20-25%). This binding is related to the partial pressure of CO2. pO2 is a major factor which could affect this binding. When pCO2 is high and pO2 is low as in the tissues, more binding of carbon dioxide occurs whereas, when the pCO2 is low and pO2 is high as in the alveoli, dissociation of CO2 from carbamino-haemoglobin takes place, i.e., CO2 which is bound to haemoglobin from the tissues is delivered at the alveoli. RBCs contain a very high concentration of the enzyme, carbonic anhydrase and minute quantities of the same is present in the plasma too. This enzyme facilitates the following reaction in both directions

Attachments:

Pakiki: Thanks
Anonymous: ur welcome bro ☺️
Similar questions