O lacking in protein; regulators of blood osmolality Question 3 Which plasma protein is correctly matched to its function? Oglobulin – transport and immunity Ofibrinogen – transport of fatty acids Oglobulin – blood clotting Oalbumin – helps to fight infection Question 4 What may be affected if the enzyme carbonic anhydrase was not ma conversion of carbon dioxide to bicarbonate ion conversion of hemoglobin to oxyhemoglobin
The Correct Answer and Explanation is:
Question 3:
The correct answer is:
Oglobulin – transport and immunity
Explanation:
Globulins are a group of plasma proteins that play an important role in the immune system and the transport of substances in the blood. They are divided into different types, including alpha, beta, and gamma globulins. Gamma globulins, also known as immunoglobulins or antibodies, are specifically responsible for fighting infections by recognizing and neutralizing foreign invaders like bacteria and viruses. Other globulins are involved in the transport of molecules such as lipids and hormones.
- Fibrinogen is involved in blood clotting, not in the transport of fatty acids.
- Albumin is the most abundant plasma protein and plays a key role in maintaining osmotic pressure, but it does not directly help fight infection.
Question 4:
The correct answer is:
Conversion of carbon dioxide to bicarbonate ion
Explanation:
Carbonic anhydrase is an enzyme that plays a vital role in regulating the pH of the blood and facilitating the transport of carbon dioxide in the body. This enzyme catalyzes the reversible conversion of carbon dioxide (CO₂) and water (H₂O) to carbonic acid (H₂CO₃), which then dissociates to form bicarbonate ions (HCO₃⁻) and protons (H⁺). The reaction is essential for the regulation of blood pH and the transport of CO₂ from tissues to the lungs, where it is expelled from the body.
- Without carbonic anhydrase, this conversion would be much slower, leading to impaired carbon dioxide transport and potentially dangerous shifts in blood pH.
- The enzyme does not directly affect the conversion of hemoglobin to oxyhemoglobin; that process is facilitated by oxygen binding to hemoglobin in the lungs and tissues.
