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← Nature & AnimalsWhich outcome occurs in mammals when subcutaneous arteriolar vasodilation is triggered by rising ambient temperatures?
A)Increased convective heat loss from skin✓
B)Reduced shivering thermogenesis in muscle
C)Decreased metabolic rate in brown fat
D)Elevated core body temperature setpoint
💡 Explanation
When ambient temperature rises, subcutaneous arteriolar vasodilation increases blood flow near the skin surface because reducing vessel resistance enhances convective heat transfer. Therefore increased heat loss results, rather than reduced shivering, decreased brown fat metabolism or elevated setpoint which would counteract the need for cooling.
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