Which of the following is an adaptation of blood-feeding arthropods that allows them to overcome the toxicity of heme groups that are released when hemoglobin is digested?

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Question restatement: Which of the following is an adaptation of blood-feeding arthropods that allows them to overcome the toxicity of heme groups that are released when hemoglobin is digested?

Option 1 — Salivary proteins: While arthropod saliva can contain components that modulate host defenses or anticoagulate blood, this choice does not describe a mechanism specifically addressing the chemical toxicity of heme released during hemoglobin digestion. Salivary factors are more about facilitating feeding than detoxifying heme-derived reactive species.

Option 2 — Thermoreceptors: Thermoreceptors are involved in sensing temperature and guiding host-seeking or feeding behavior. They do not directly mitigate the chemical toxicity associated with heme or its breakdown products, so this does not explain adaptation to heme toxicity.

Option 3 — Bacteriome: The bacteriome refers to the community of microbes in the gut or other tissues. While microbiota can influence nutrition and immunity, this option does not describe a direct enzymatic strategy used by the arthropod to detoxify heme after blood digestion.

Option 4 — Diuresis: Diuresis involves increased urine production to remove excess liquid. It is a fluid-regulation strategy, not a detoxification mechanism for heme or its reactive byproducts, so it does not address heme toxicity.

Option 5 — Antioxidant enzymes: This choice identifies enzymes such as catalase, superoxide dismutase, and peroxidases that neutralize reactive oxygen species and detoxify heme-derived radicals. These enzymatic defenses directly counteract the oxidative stress and toxicity resulting from heme release during hemoglobin digestion, making this a biologically appropriate adaptation for blood-feeding arthropods.

Which of the following is an adaptation of blood-feeding arthropods that allows them to overcome the toxicity of heme groups that are released when hemoglobin is digested?单项选择题

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