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
When a person changes position from standing to lying down, the following change is seen 
Select and explain. 
A. Heart rate increases, B. Venous return to heart increases immediately, C. Cerebral blood flow increases, D. Blood flow at apices of lung decreases
B: Venous return to heart increases immediately
Answer: B: Venous return to heart increases immediately 
Explanation: When changing position from standing to lying,
Heart rate does not increase. Cerebral flow is unchanged because of autoregulation. 
In lying position apex of the lung is more perfused as the effect of gravity is not much as in standing.  
Venous return to heart increases as pooled blood in lower extremities returns to heart faster.