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← Nature & AnimalsWhich outcome occurs when a mammal experiences sustained vasodilation to counteract hyperthermia?
A)Decreased blood pressure and fainting✓
B)Increased metabolic rate from heat loss
C)Elevated core body temperature set point
D)Reduced shivering triggered by cold
💡 Explanation
When vasodilation continues to counteract external heat, increased blood flow to the skin occurs because of peripheral blood vessel widening, reducing systemic blood pressure, sometimes leading to syncope. Therefore deceased blood pressure results, rather than metabolic increases, elevated setpoint, or reduced shivering, which each operate with different mechanisms.
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