This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
[{'content': 'Blood in splanchnic area during exercise is decreased due to : \nSelect and explain. \nA. Venoconstriction with decreased blood flow, B. Venodilation with decreased blood flow, C. Venodilation with increased blood flow, D. Venodilation with normal blood flow', 'role': 'user'}, {'content': "Answer: A \nExplanation: A i.e. Venoconstriction with decreased blood flow During vigrous exercise, constriction of vessels in splanchnic organ, and decreased blood ' storage' in liver & other poion of splanchnic bed occursQ, which may increase the volume of actively circulating blood, perfusion the muscles by as much as 30%. Contraction of the capacitance vessels in the viscera can pump a litre of blood into the aerial circulation, in less than a minute.", 'role': 'assistant'}]