Which component forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process?

Serotonin.

Platelet factor III.

Von Willebrand factor.

Adenosine diphosphate.

Answer and Explanation

The Correct Answer is C

Choice A rationale:

Serotonin is a neurotransmitter that plays a role in mood regulation, sleep, and other functions in the body. It is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process.

Choice B rationale:

Platelet factor III is not a component that forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process. Platelet factor III is not widely recognized in the context of clotting; it is more commonly referred to as tissue factor and is involved in the extrinsic pathway of coagulation.

Choice C rationale:

Von Willebrand factor (VWF) is a protein that plays a crucial role in hemostasis. It forms an adhesive bridge between platelets and vascular subendothelial structures, particularly at sites of vascular injury. VWF helps platelets adhere to the injured vessel wall, leading to the formation of a stable blood clot. This process is essential for preventing excessive bleeding. A deficiency or dysfunction in VWF can lead to von Willebrand disease, a bleeding disorder characterized by prolonged bleeding times.

Choice D rationale:

Adenosine diphosphate (ADP) is a molecule released by platelets when they are activated. ADP helps in the aggregation of platelets, but it does not directly form an adhesive bridge between platelets and vascular subendothelial structures.

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Correct Answer is C

Explanation

Choice A rationale: Drinking 14 glasses of water daily is not specifically harmful for patients with thrombocytopenia, though it is important to ensure fluid intake is balanced with the individual's needs. However, excessive water intake is generally not related to increased bleeding risks, which is a primary concern for patients with low platelet counts.

Choice B rationale: Shaving once a day using an electric razor is an appropriate precaution for patients with thrombocytopenia. Electric razors are less likely to cause cuts compared to traditional razors, thereby reducing the risk of bleeding. This measure is important for individuals with low platelet counts to minimize the risk of bleeding from minor injuries.

Choice C rationale: Using an alcohol-based mouthwash twice a day is not recommended for patients with thrombocytopenia. Alcohol-based mouthwash can cause dryness and irritation of the mucous membranes, which may lead to bleeding, especially in individuals with low platelet counts. Instead, non-alcoholic mouthwashes should be used to maintain oral hygiene without the risk of causing mucosal damage.

Choice D rationale: Brushing teeth with a soft-bristle toothbrush twice a day is recommended for patients with thrombocytopenia. Soft-bristle toothbrushes help reduce the risk of gum injury and bleeding, which is important for individuals with low platelet counts. Maintaining good oral hygiene with minimal trauma is crucial for these patients

A. Eliminating excess H+. B. Excreting excess water. C. Eliminating excess CO2. D. Reabsorbing additional HCO3-. E. Reabsorbing additional sodium ions.

Correct Answer is ["A","D"]

Explanation

Choice A rationale:

Eliminating excess H+ ions (hydrogen ions) is a primary mechanism the kidneys use to buffer acidosis. In acidosis, there is an excess of hydrogen ions in the body, leading to a decrease in pH. The kidneys help regulate the body's pH by excreting hydrogen ions to lower acidity.

Choice B rationale:

Excreting excess water is not a specific acid-base mechanism related to acidosis. While maintaining proper hydration is important for overall health, it does not directly influence the body's acid-base balance in the context of acidosis.

Choice C rationale:

Eliminating excess CO2 is primarily a respiratory mechanism, not a kidney function. CO2 elimination is more related to the lungs' ability to regulate the body's pH by adjusting respiratory rate and depth.

Choice D rationale:

Reabsorbing additional HCO3- ions (bicarbonate ions) is a renal mechanism to buffer acidosis. Bicarbonate ions act as a base and can neutralize excess hydrogen ions, raising the pH of the body fluids.

Choice E rationale:

Reabsorbing additional sodium ions is not a specific acid-base mechanism related to acidosis. While sodium ions are important for various physiological processes, they do not play a direct role in buffering acidosis.

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Which component forms an adhesive bridge between platelets and vascular subendothelial structures in the clotting process?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

The nurse provides education to a patient with thrombocytopenia about precautions to be taken at home. The nurse identifies that further teaching is needed when the patient performs which action?

Correct Answer is C

Explanation

Which acid-base mechanism would the kidney use to buffer a patient's acidosis (serum pH <7.35)? Select all that apply.One, some, or all responses may be correct.

Correct Answer is ["A","D"]

Explanation

Which information would the nurse include when discussing pain due to chronic stable angina with the patient?

Which goal is a primary objective for a patient who has chronic heart failure (HF)?

Which role is attributed to the base in the acid-base balance?

A female patient with chronic hypertension is admitted to the emergency department with a sudden rise in blood pressure (BP) Which question is the priority for the nurse to ask the patient?

The nurse recognizes that patients with von Willebrand disease are at risk for prolonged bleeding times for which reason?

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