Multiple Choice
Which of the following are cell fragments that play an important role in the blood clotting process?
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17. The Blood
Platelets: Hemostasis
Multiple Choice
In the context of hemostasis, which blood component is primarily acted upon by aspirin to reduce clot formation?
A
Neutrophils, by blocking chemotaxis and phagocytosis at injury sites
B
Plasma albumin, by increasing oncotic pressure to dilute clotting factors
C
Erythrocytes (red blood cells), by decreasing hemoglobin’s affinity for oxygen
D
Platelets (thrombocytes), by inhibiting cyclooxygenase and reducing thromboxane A2 production
Verified step by step guidance1
Understand the process of hemostasis, which involves blood vessel constriction, platelet plug formation, and coagulation to stop bleeding.
Identify the role of platelets (thrombocytes) in hemostasis, specifically their function in forming a platelet plug at the site of injury.
Recognize that aspirin acts on platelets by inhibiting the enzyme cyclooxygenase (COX), which is crucial for producing thromboxane A2, a molecule that promotes platelet aggregation.
Note that by reducing thromboxane A2 production, aspirin decreases platelet aggregation, thereby reducing clot formation.
Conclude that among the given options, platelets are the primary blood component affected by aspirin to reduce clot formation.
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