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Urinary System Functions Quiz

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Questions and Answers

What is the role of natriuretic hormone in diabetic kidney disease?

Promotes Na+ reabsorption

Causes vasodilation

Opposes the actions of aldosterone (correct)

Increases Ca++ reabsorption

Which hormone is responsible for increasing Ca++ reabsorption and blocking phosphate reabsorption?

Parathyroid hormone (correct)

Renin

Natriuretic hormone

Aldosterone

What is the function of volume sensing mechanisms in the body?

Regulate calcium levels

Control glucose metabolism

Check blood pressure (correct)

Monitor oxygen levels

How does caffeine affect the nephron?

Enhances vasodilation Signup and view all the answers

Which hormone indirectly controls potassium levels in the body?

Aldosterone Signup and view all the answers

What is the primary function of hydrogen ions in acid/base homeostasis?

Maintain proper pH balance Signup and view all the answers

What is the role of the nephron in the kidney?

Balance constituents in the blood and form urine Signup and view all the answers

What is the main purpose of the renal hilum?

Funnels urine into the ureters Signup and view all the answers

What is the function of the macula densa in the kidney nephron?

Regulates renin release Signup and view all the answers

Which part of the kidney is responsible for releasing ATP and adenosine based on plasma fluid osmolarity?

Loop of Henle Signup and view all the answers

Why is systemic edema caused when too much protein enters the filtrate in the kidneys?

Increased osmotic pressure in circulating blood Signup and view all the answers

What substance is actively transported by the Proximal Convoluted Tubule of the nephron?

Glucose Signup and view all the answers

What is the main function of the collecting ducts in the kidney nephron?

Reabsorb water based on blood osmolarity Signup and view all the answers

'Tubular reabsorption' refers to substances that are reabsorbed by what mechanisms?

Diffusion and secondary active transport Signup and view all the answers

'Polyuria' is a condition that indicates what volume of urine excretion per day?

>500 mL/day Signup and view all the answers