Certified Wildlife Rehabilitator Practice Test

Which of the following are considered plasma proteins?

1. Globulins and Hemoglobin

2. Fibrinogen and Albumin

3. Myoglobin and Serum Albumin

4. Insulin and Enzymes

The correct answer is: Fibrinogen and Albumin

Plasma proteins play critical roles in various physiological functions, including maintaining osmotic pressure, transportation of substances, and immune responses. Among the important plasma proteins, fibrinogen and albumin stand out for their distinct contributions. Fibrinogen is essential for blood clotting. It is converted into fibrin during the coagulation process, helping to form a stable clot that prevents excessive bleeding after an injury. Albumin, on the other hand, is the most abundant plasma protein found in blood serum and is responsible for maintaining oncotic pressure, which helps retain fluid in the bloodstream. Additionally, albumin serves as a carrier protein for various substances, including hormones and fatty acids. The other options included proteins that do not fit the category of plasma proteins. For example, globulins, while they are indeed plasma proteins with roles in the immune system, specifically the production of antibodies, were mentioned alongside hemoglobin, which is primarily responsible for oxygen transport in red blood cells rather than being classified as a plasma protein. Similarly, myoglobin is found in muscle tissue and functions to bind oxygen within muscles, rather than in the plasma. Insulin is a hormone involved in glucose metabolism, and enzymes are catalyst proteins that facilitate biochemical reactions; neither fits the classification of