In a normal person which of the following occurs when he changes to supine position from standing: (A) Cerebral perfusion increases, (B) Hea rate settles to a higher level, (C) Immediate increase in venous return, (D) Decreased perfusion to the apex
Answer is C. Venous return is decreased in standing posture due to pooling of blood in lower extremities and is maximum in lying down position. Ref: Textbook of medical physiology by N Geetha, 2nd edition, page no. 170