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Which of the following clump and adhere to the wall of the injured blood vessel to begin the process of hemostasis?

A.

White blood cells

B.

Antibodies

C.

Red blood cells

D.

Platelets

Answer and Explanation

The Correct Answer is D

White Blood Cells (WBCs): WBCs are part of the immune system and play a role in fighting infections. However, they are not directly involved in hemostasis or clot formation.

Antibodies: Antibodies are proteins produced by the immune system to recognize and neutralize foreign substances (antigens). They do not directly participate in clot formation.

Red Blood Cells (RBCs): RBCs carry oxygen and carbon dioxide but are not directly involved in clotting. They do not adhere to the vessel wall during hemostasis.

Platelets: Platelets are small cell fragments in the blood. They clump together (aggregate) at the site of injury to form a temporary plug (platelet plug). Platelets adhere to the injured vessel wall and release chemicals that initiate clotting.


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Related Questions

Correct Answer is {"dropdown-group-1":"A","dropdown-group-2":"A"}

Explanation

a. Hemostasis: Hemostasis refers to the process of stopping bleeding or preventing excessive blood loss. It involves several steps, including vasoconstriction, platelet aggregation, and clot formation. Hemostasis is the correct answer because it directly addresses the stopping of blood flow to protect the body from injury.

b. Thrombolytics: Thrombolytics are medications used to dissolve blood clots. They are not the natural mechanism for stopping blood flow. Thrombolytics are not the correct answer in this context.

c. Hematopoiesis: Hematopoiesis is the process of forming blood cells (including red blood cells, white blood cells, and platelets) in the bone marrow. It is essential for maintaining blood cell populations but does not directly stop blood flow. Hematopoiesis is not related to stopping blood flow.

d. Anticoagulation: Anticoagulation refers to preventing blood clot formation. While it is important for certain medical conditions, it does not directly stop blood flow. Anticoagulation is not the primary mechanism for stopping bleeding.

Correct Answer is D

Explanation

A. Most CAM therapies are not totally ineffective: While some CAM therapies may lack strong scientific evidence, it's not accurate to say they are all ineffective. Some CAM therapies may have benefits, but it's important to be aware of them to avoid interactions.

B. Not all CAM therapies are dangerous: Many CAM therapies are generally safe. However, some can interact with medications or have unforeseen side effects, so assessing use is crucial.

C. Additional treatment may still be needed: Even if a patient uses CAM, they might still require conventional medical treatment. Assessing CAM use helps ensure a complete picture of the patient's healthcare regimen.

D. CAM therapies could interact with prescription and OTC medications. Correct. The primary reason to assess CAM use is to identify potential interactions with medications, potentially improving patient safety and treatment effectiveness.

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