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← Nature & AnimalsWhich outcome occurs when a grey seal undergoes prolonged diving in icy waters, inhibiting efficient oxygen delivery to vital organs?
A)Peripheral vasoconstriction maintains core
B)Peripheral vasodilation increases oxygen demand✓
C)Metabolic suppression lowers demand
D)Increased red blood cell production
💡 Explanation
Peripheral tissues suffer compromised circulation; vasodilation near the surface occurs, increasing blood flow, because this conserves core temperatures and the metabolic rate is high during swimming. Therefore, oxygen demand heightens rather than being reduced, leading to inefficiency by peripheral blood supply changes when submerged.
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