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← Nature & AnimalsWhich outcome is directly promoted by vasodilation in a mammal initiating exercise and increasing metabolic rate?
A)Enhanced heat dissipation at the skin surface✓
B)Decreased oxygen delivery to muscle tissues
C)Reduced glucose uptake by liver cells
D)Increased shivering thermogenesis in muscles
💡 Explanation
When metabolic rate increases during exercise initiation, vasodilation occurs because smooth muscle cells in blood vessel walls relax, increasing blood flow near the skin and promoting conduction heat transfer. Therefore enhanced heat dissipation results, rather than affecting shivers, liver function, or direct oxygen delivery which all have different regulatory mechanisms.
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