2. Which of the following statements about albumin is true? 1. It draws water out of the blood vessels and into the body's tissues. 2. It is the most abundant plasmalprotein. 3. It is produced by specialized leukocytes called plasma cells. 4. All of the above are true.

The correct answer is 2. It is the most abundant plasma protein.<br /><br />Albumin is a type of protein that is produced by the liver and is the most abundant protein in the plasma, which is the liquid component of blood. It plays a crucial role in maintaining the osmotic pressure of the blood, which helps to regulate the movement of water between the blood vessels and the body's tissues. This means that albumin helps to draw water out of the blood vessels and into the body's tissues, which is statement 1.<br /><br />Statement 3 is incorrect because albumin is not produced by specialized leukocytes called plasma cells. Instead, albumin is produced by the liver.<br /><br />Statement 4 is also incorrect because not all of the statements are true. Only statement 2 is true.