Question 1:

Lin is a 21 year old university student who is involved in a car accident on her way to work. She has a severe laceration to her right thigh, and has lost a lot of blood.

Using your knowledge of the regulation of blood pressure, answer the following questions.

Part A. Explain the physiological mechanisms that will maintain Lin’s mean arterial pressure in the seconds to minutes after the accident.

Part B. Explain the physiological mechanisms that will act to return Lin’s mean arterial pressure to normal levels in the days to weeks after the accident.