Blood proteins connected with antibodies are?

HPSSC Staff Nurse - 2021

Applied Physiology

Easy

Appeared in: HPSSC Staff Nurse - 2021

Explanation

Gamma globulins are a class of plasma proteins that are functionally identical to antibodies, also known as immunoglobulins (e.g., IgG, IgA, IgM).
Their primary function is to provide humoral immunity by identifying and neutralizing foreign pathogens like bacteria and viruses.
These proteins are synthesized by plasma cells, which are part of the body's lymphoid tissues, in response to antigenic stimulation.
The key differentiator is that while other proteins transport substances or maintain pressure, gamma globulins are specifically designed for immune defense.

Option A: Albumins are the most abundant plasma proteins, but their primary functions are maintaining colloid osmotic pressure and transporting various substances (e.g., hormones, drugs, fatty acids), not acting as antibodies.
Option B: B-globulins (beta-globulins) are mainly transport proteins. A key example is transferrin, which transports iron in the blood. They are not antibodies.
Option D: A-globulins (alpha-globulins) are a diverse group of proteins involved in transport and inflammation regulation. Examples include α1-antitrypsin (a protease inhibitor) and haptoglobin (binds free hemoglobin). They do not function as antibodies.

Clinical Relevance

Nursing practice connection: Knowing Functions of Plasma Proteins helps nurses interpret findings accurately and avoid errors in routine assessment, medication administration, and patient teaching.
Nurses often review lab results, including serum protein electrophoresis (SPEP). Understanding that the gamma globulin fraction represents antibodies is crucial for interpreting a patient's immune status.
A patient with low gamma globulins (hypogammaglobulinemia) is immunocompromised and at high risk for infection. Nursing care would focus on infection prevention, monitoring for signs of infection, and potentially administering immunoglobulin therapy.
A patient with a high monoclonal gamma globulin level (M-spike) may have multiple myeloma. The nurse would monitor for complications like bone pain, kidney failure, and hypercalcemia.

How to Approach the Question

First, identify the key terms in the question: 'blood proteins' and 'antibodies'. This directs you to the topic of plasma proteins and their functions.
This is a factual recall question. The goal is to match the function (antibodies) with the correct protein class.
Systematically review the options: Albumin, B-globulins, Gamma globulins, and A-globulins.
Recall the primary function of each class. Albumin is for osmotic pressure. Alpha and Beta globulins are mainly for transport.
Recognize that 'Gamma globulins' is the specific class of proteins that are synonymous with immunoglobulins or antibodies, which are central to the immune response.
Therefore, select Gamma globulins as the only option directly connected with antibody function.

Concept Tested & Keywords

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