What is the significance of the von Willebrand factor in the coagulation cascade, particularly in relation to platelet adhesion and aggregation?

A It inhibits platelet activation and aggregation
B It promotes platelet adhesion and aggregation at the site of injury ✓
C It has no role in platelet function
D It is involved in the intrinsic pathway of coagulation only

Explanation

The von Willebrand factor plays a crucial role in the initiation of hemostasis by facilitating platelet adhesion to the damaged vascular endothelium and promoting platelet aggregation.

Source

Harrison's Principles of Internal Medicine
Hematology Hematology: Coagulation Disorders Hematology: Coagulation Disorders Medium MEDICAL Confidence: high