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Question 4: Hearts, Kidneys, and Homeostasis. (25 points) In a comprehensive essay, discuss the following topics below: 1.) Discuss the role of insulin and glucagon molecular action in response to high or low glucose levels in the blood plasma. (15 points). 2.) Distinguish between negative and positive feedback mechanisms in the context of blood pressure homeostasis and also write your prediction if there is a loss-of-function variant in renin and how would it affect blood pressure homeostasis. (10 points)