Question

choose the correct statement regarding the function of platelets. multiple choice they secrete chemicals that repel neutrophils and monocytes. they secrete factors that inhibit mitosis in fibroblasts and smooth muscle. they secrete procoagulants, or clotting factors, which promote blood clotting. they secrete vasodilators. they prevent the formation of a clot - dissolving enzyme that dissolves blood clots which have outlasted their usefulness.

Explanation:

Platelets are crucial for blood clotting. They secrete procoagulants (clotting factors) which play a vital role in the coagulation cascade. Neutrophils and monocytes are attracted (not repelled) to sites of injury. Platelets secrete factors that promote (not inhibit) mitosis in fibroblasts and smooth muscle for wound repair. Vasoconstrictors (not vasodilators) are secreted by platelets. Also, platelets do not prevent the formation of clot - dissolving enzymes; rather, the body has a balance between clot formation and dissolution.

Answer:

They secrete procoagulants, or clotting factors, which promote blood clotting.