When there is excess Na⁺ in the body A) The plasma volume is expanded, and arterial blood pressure is increased. B) As a compensatory measure, the GFR is increased. C) As a compensatory measure, aldosterone secretion is increased to increase the amount of Na⁺ reabsorbed. D) The plasma volume is expanded and arterial blood pressure is increased, and as a compensatory measure, the GFR is increased. E) All of these.

Question

Quizplus · Accepted Answer

Excess Na⁺ in the body causes expansion of plasma volume and increase in arterial blood pressure. As a compensatory measure, the glomerular filtration rate (GFR) is increased. However, the secretion of aldosterone is not increased as excess Na⁺ already provides enough stimulus for Na⁺ reabsorption. Therefore, option D is the best choice.

When There Is Excess Na+ in the Body

When There Is Excess Na⁺ in the Body