For each of the following situations indicate The problems c

For each of the following situations, indicate: The problems confronting the pressure control system (change in blood volume or change in blood pressure). What pressure control mechanisms are involved for each type of problem indicated

-when a person bleeds profusely

- when a person is dehydrated

-when a person is over hydrated.

Solution

-when a person bleeds profusely ---> Excessive bleeding causes fall in blood pressure. To compensate the blood loss, the sympathetic nervous system is stimulated, which causes vasoconstriction and reduces blood flow to the kidney to reduce the volume of urine formation.

- when a person is dehydrated ----> Renin-angiotensin system - increased aldosterone - increased fluid volume and pressure

-when a person is over hydrated -----> Renin-angiotensin system - decreased aldosterone - decreased fluid volume and pressure