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: Pathology
Compensatory mechanism in acute hemorrhage? 
Select and explain. 
A. Decreased myocardial contractility, B. Decreased hea rate, C. Increased hea rate, D. Increased respiratory rate
C: Increased hea rate
Answer: C: Increased hea rate 
Explanation: Ans. is 'c' i.e., Increased hea rate Compensatory mechanisms in acute hemorrhage In acute hemorrhage there is compensatory sympathetic stimulation which causes :? 1) Generalized vasoconstriction with increased total peripheral resistance (TFR). 2) Increased hea rate (tachycardia). 3) Increased cardiac contractility. 4) Increased renin release causing sodium and water retention through RAA system. 5) Shift of fluid from intracellular and interstitial space into vascular space.