[Solved] What makes the risk-expected return profile attractive to speculators who purchase put and call options? What is the risk-expected return profile for writers of naked put and call options? Myeloblast: Immature cell from which the different granulocytes develop. Proerythroblast: Cell that matures into an erythrocyte. Platelet Release Reaction: The process by which platelets release chemical compounds to promote blood clotting and attract more platelets to the site of an injury. ADP: Adenosine diphosphate, a molecule involved in energy transfer within cells, that is converted to ATP during cellular respiration.