Final answer:
The granules of basophils contain heparin, an anticoagulant, and histamine, a vasodilator. Heparin prevents blood from clotting, while histamine increases blood flow by widening blood vessels.
Step-by-step explanation:
The functions of heparin and histamine, which are contained in the granules of basophils, can be correctly identified as follows: Heparin acts as an anticoagulant, which means it prevents the blood from clotting.
On the other hand, Histamine serves as a vasodilator, meaning it has the ability to widen blood vessels, increasing blood flow. Therefore, the correct answer is 1) Heparin is an anticoagulant and histamine is a vasodilator.
Heparin is an anticoagulant, meaning it prevents blood clotting. It works by inhibiting certain clotting factors in the blood. This is important for preventing excessive clotting within blood vessels.
Histamine, on the other hand, is a vasodilator, which means it causes blood vessels to widen and increase blood flow. It is involved in many physiological processes, including inflammation and allergic reactions.
Therefore, the correct answer is option 1) Heparin is an anticoagulant and histamine is a vasodilator.