Fibrinogen helps in \ \ \ \ \ \ \ \ . - MP NHM CHO-2024 (Shift-1)

MP NHM CHO-2024 (Shift-1)

Applied Physiology

Easy

Appeared in: MP NHM CHO-2024 (Shift-1)

Explanation

Fibrinogen, also known as Factor I, is a plasma glycoprotein synthesized by the liver.
Its primary and essential function is to serve as the precursor to fibrin in the common pathway of the coagulation cascade.
Upon activation by the enzyme thrombin, soluble fibrinogen is converted into insoluble fibrin strands.
These fibrin strands polymerize and cross-link to form a stable mesh, which traps platelets and red blood cells to form a blood clot, achieving hemostasis (stopping blood loss).

Option B: Transport of substances like hormones, drugs, and fatty acids is not the primary function of fibrinogen.
Option C: Fibrinogen has a negligible effect on maintaining blood pressure compared to other plasma proteins.
Option D: Fibrinogen's contribution to blood volume is minimal.

Visual 1: Flowchart: Depicting the final common pathway of coagulation, showing Thrombin converting Fibrinogen into Fibr, which then forms a stable clot.
Visual 2: Diagram: Illustrating the main types of plasma proteins (Albumin, Globulins, Fibrinogen) and their relative sizes and concentrations in the blood.

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Function of Plasma Proteins (Fibrinogen) as background academic context rather than a clinical decision trigger.
A nurse must monitor patients with liver disease for signs of bleeding (e.g., bruising, petechiae, bleeding gums) because the liver synthesizes fibrinogen. Impaired liver function can lead to decreased fibrinogen levels and an increased risk of hemorrhage.
Fibrinogen levels are often measured as part of a coagulation panel. The normal range is typically 200-400 mg/dL. Deviations can indicate a bleeding disorder or an inflammatory state.
What if a patient is in Disseminated Intravascular Coagulation (DIC)? In the early stages, widespread clotting consumes fibrinogen, leading to a sharp drop in its levels. This paradoxically results in a high risk of severe, uncontrollable bleeding, a critical condition requiring immediate nursing assessment and intervention.

How to Approach the Question

Identify the key term in the question, which is 'Fibrinogen'.
Recall the major components of blood plasma and their functions.
Associate Fibrinogen with its primary role in the body.
Evaluate the given options: 'blood clotting', 'transport', 'maintaining blood pressure', and 'maintaining blood volume'.
Select the option that accurately describes the main function of fibrinogen, which is its role as a clotting factor.
Differentiate this from the functions of other plasma proteins like albumin (oncotic pressure, transport) and globulins (immunity, transport).

Concept Tested & Keywords

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