AEMCA Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the AEMCA Exam with flashcards and multiple-choice questions, complete with hints and explanations. Get exam-ready today!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the function of Antidiuretic Hormone (ADH) in the kidneys?

Stimulate urine production
Cause the kidneys to reabsorb water
Promote sodium reabsorption
Inhibit aldosterone secretion

The correct answer is: Cause the kidneys to reabsorb water

Antidiuretic Hormone (ADH), also known as vasopressin, plays a crucial role in regulating the body's water balance through its action on the kidneys. The primary function of ADH is to cause the kidneys to reabsorb water from the urine back into the bloodstream. When ADH is released, it specifically targets the collecting ducts in the kidney nephrons, increasing their permeability to water. This enhanced reabsorption leads to the conservation of water, resulting in more concentrated urine and effectively helping to maintain blood volume and pressure. In conditions where the body is dehydrated or when blood osmolarity is high, ADH secretion increases, promoting further water reabsorption to counteract these states. This mechanism is vital for maintaining homeostasis, particularly during times of fluid imbalance.