Please answer ALL questions A-G! Do not answer if you will not complete all ques

Question

Please answer ALL questions A-G! Do not answer if you will not complete all questions!!!!

You are running late for physiology class, and instead of cutting through a yard where there is a dangerous cat, you go the long way and run all the way to school. It is very hot and you sweat excessively and become dehydrated. You lose proportionately more water than salts.

A) What happens to your mean arterial pressure as a direct result of dehydration?

B) Will your heart rate be elevated or extra slow as a result of dehydration?

C) Will your stroke volume be elevated or lower than normal as a result of dehydration?

D) What happens to the osmolarity of your blood?

E) What hormone is released as direct response to this change in osmolarity?

F) On what region of the nephron does this hormone act?

G) What enzyme is released as a direct result of the change in renal blood pressure?

Explanation / Answer

Answer 1) mean arterial pressure deceases due to decrease in fluid from blood volume

Answer2) heart rate elevated in order to maintain cardiac putput in case of dehydration

Answer 3) reduction in Stroke volume is seen in dehydration

Answer 4) osmolality increases as there is more fluid loss as compare to salts

Answer5) change in osmolality causes release of antidiuretic hormone (ADH) from posterior pitutary.

Answer6) ADH act on distal convolated tubules (DCT) AND ON COLLECTING DUCTS (CD)

Answer 7)Renin release from JG cells when there is change in renal blood flow..

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