Apyrase and nitrophorin are proteins produced by arthropods that assist with which aspect of blood feeding?

Question

BlackTom AI · Accepted Answer

Question restatement: The prompt asks which aspect of blood feeding is aided by two arthropod proteins, apyrase and nitrophorin.
Option 1: Avoiding host defenses. This is the core function of both proteins: apyrase hydrolyzes ATP and ADP to prevent platelet activation and aggregation, thereby reducing blood clotting, while nitrophorin carries nitric oxide to promote vasodilation and further suppress host hemostatic responses. Together, these actions help the insect feed without triggering strong host defenses. This option aligns with known roles of these proteins.
Option 2: Finding a host. Apyrase and nitrophorin are not primarily involved in host-seeking or locating a host. Their activities occur after contact with the host’s blood, aiding feeding rather than host detection.
Option 3: Diuresis. Diuresis refers to fluid excretion, typically after feeding or in excretion processes, and is not a described function of apyrase or nitrophorin in the context of blood feeding. These proteins do not primarily regulate fluid elimination.
Option 4: Finding a blood vessel. While accessing a vessel is essential for feeding, these proteins do not act as sensors or facilitators for locating a vessel; their roles are biochemical to prevent clotting and promote flow once a vessel is reached.
In summary, the two proteins are best understood as anti-hemostatic factors that undermine host defenses during feeding, rather than factors involved in host detection, diuresis, or vessel localization.

Apyrase and nitrophorin are proteins produced by arthropods that assist with which aspect of blood feeding?单项选择题

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