You are running late for physiology class, and instead of cutting through a yard

Question

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

A. As a direct result of dehydration due to running, the cardiac output increases and the total resistance decrease.So, there by the mean arterial pressure increases to small extent.

B. Increased heart rate is the premium sign of potential dehydration.

C. There will be small increase in stroke volume as a result of increased cardiac output.

D. During dehydration, the osmolarity of blood will be decreased as plasma osmolarity is the ratio of solutes to water in blood plasma.

E. The harmone is anti diuretic harmone.

F. The harmone acts on posterior pitutary region of nephron.

G. The enzyme released is angiotensin II.

Related Questions

Navigate

• Browse (All)
• Browse Y
• Subjects

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.