Advanced Patient Assessment Practice Exam

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Study for the Advanced Patient Assessment Exam. Use flashcards and multiple-choice questions, each enriched with hints and detailed explanations. Equip yourself for success with this comprehensive prep!

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Which of the following is a formed element found in circulating blood?

Sodium
Platelets
Potassium
Bicarbonate

The correct answer is: Platelets

Platelets are essential components of the blood that play a crucial role in hemostasis, the process of blood clotting. As formed elements, they are derived from megakaryocytes in the bone marrow and are crucial for the prevention of excessive bleeding. When a blood vessel is injured, platelets aggregate at the site of injury, adhere to the damaged area, and facilitate the formation of a stable blood clot. This process not only stops bleeding but also initiates the healing process. In contrast, the other options represent substances that are dissolved in plasma rather than formed elements. Sodium and potassium are electrolytes that help maintain osmotic balance and cell function within the body. Bicarbonate acts as a buffer that helps maintain the pH of blood, playing a significant role in acid-base balance. These substances circulate in the blood but are not classified as formed elements like platelets are.