Which of the following is used to describe the amount of blood ejected from the left ventricle during each contraction?

A. An increased pulse is a later symptom of dehydration, as the body attempts to maintain blood pressure and circulation when fluid levels are low.

B. Poor skin turgor is a sign of more advanced dehydration and is usually detected when skin remains tented after being pinched.

C. Decreased urinary output typically occurs as dehydration progresses and the body conserves water, but it is not usually the first sign.

D. Thirst is one of the earliest and most common symptoms of dehydration, as the body signals the need for water intake to restore fluid balance. This is the correct answer.

A. Angiotensin does not inhibit thirst; in fact, it stimulates thirst as part of its role in increasing blood pressure and fluid retention.

B. Angiotensin, specifically angiotensin II, stimulates vasoconstriction, which increases blood pressure by narrowing blood vessels. This is one of its primary actions in regulating blood volume and pressure.

C. Angiotensin actually promotes the retention of salt and water in the kidneys to increase blood volume and pressure, rather than stimulating their elimination.

D. Angiotensin does not inhibit antidiuretic hormone (ADH) release; it actually stimulates the release of ADH, which promotes water retention by the kidneys to increase blood volume.