Question

The dense granules of platelets contain which substances?

1) ADP and Ca₂⁺
2) ADP and Mg₂⁺
3) ATP and Ca₂⁺
4) ATP and Mg₂⁺

Answer 1

The dense granules of platelets contain ADP and Ca²⁺, which play important roles in blood clotting.

Step-by-step explanation:

The dense granules of platelets contain ADP and Ca²⁺. These substances play important roles in the process of blood clotting. ADP helps additional platelets adhere to the injury site, reinforcing and expanding the platelet plug, while Ca²⁺ is involved in the activation of various clotting factors.