Identify the incorrect statement regarding plasma:

Options

A. It constitutes about 55% of the blood
B. The most common plasma protein is albumin
C. Globulins are mainly responsible for colloid osmotic pressure in the blood.
D. If clotting factors are removed from the plasma, what remains is the serum.

Answer

To identify the incorrect statement regarding plasma, we will analyze each option provided in the question step by step.

### Step 1: Understand what plasma is
Plasma is the liquid component of blood, making up about 55% of its total volume. It serves as a medium for transporting nutrients, hormones, and waste products throughout the body.

**Hint:** Remember that plasma is a significant part of blood and is primarily liquid.

### Step 2: Evaluate Option 1
Option 1 states that plasma constitutes about 55% of the blood. This is a correct statement as plasma indeed makes up approximately 55% of the blood volume.

**Hint:** Recall the percentage of plasma in blood to assess the accuracy of this statement.

### Step 3: Evaluate Option 2
Option 2 claims that the most common plasma protein is albumin. This statement is also correct, as albumin is the most abundant protein in plasma and plays a crucial role in maintaining osmotic pressure.

**Hint:** Consider the main functions of plasma proteins and which one is most prevalent.

### Step 4: Evaluate Option 3
Option 3 states that globulins are mainly responsible for colloid osmotic pressure in the blood. This statement is incorrect. Albumin, not globulins, is primarily responsible for maintaining colloid osmotic pressure. Globulins are more associated with immune functions.

**Hint:** Think about the functions of different plasma proteins and which one is responsible for osmotic pressure.

### Step 5: Evaluate Option 4
Option 4 mentions that if clotting factors are removed from plasma, what remains is serum. This statement is correct. Serum is the liquid that remains after the clotting factors have been removed from plasma.

**Hint:** Remember the distinction between plasma and serum regarding clotting factors.

### Conclusion
After evaluating all the options, the incorrect statement regarding plasma is Option 3: "Globulins are mainly responsible for colloid osmotic pressure in the blood."

**Final Answer:** Option 3 is the incorrect statement.