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Vasopressin Test and Kidney Function Quiz

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Questions and Answers

What is the primary purpose of tubular reabsorption in the nephron?

To filter out cells and large proteins from the blood
To transport molecules needed by the body from the ultrafiltrate back into the blood (correct)
To regulate the pH of the blood
To transport molecules from the blood directly into the urine

What is the primary function of glomerular filtration in the nephron?

To regulate the pH of the blood
To transport molecules from the blood directly into the urine
To reabsorb water and electrolytes from the ultrafiltrate back into the blood
To filter out cells and large proteins from the blood to form an ultrafiltrate (correct)

Which of the following hormones is NOT secreted by the kidney?

Parathyroid Hormone (PTH) (correct)
Erythropoietin
Renin
Vitamin D3

Which of the following processes in the nephron involves the active transport of molecules?

Tubular secretion (C) Signup and view all the answers

Which of the following hormones regulates blood pressure via the renin-angiotensin system?

Aldosterone (C) Signup and view all the answers

What is the primary purpose of tubular secretion in the nephron?

To transport molecules from the blood directly into the urine (C) Signup and view all the answers

What is the main determinant of the total filtration rate of the kidneys?

The difference between the blood pressure in the glomerular capillaries and the hydrostatic pressure in the lumen of the nephron (D) Signup and view all the answers

What percentage of the 180 liters that is filtered each day is reabsorbed back into the body?

99% (D) Signup and view all the answers

Which of the following is NOT a tubular function test?

Glomerular filtration rate (GFR) (C) Signup and view all the answers

What is the purpose of measuring the urine concentration in renal function tests?

To evaluate the kidney's ability to concentrate and dilute urine (A) Signup and view all the answers

What is the primary function of the glomerular filtration rate (GFR) test?

To measure the volume of blood filtered through the glomeruli each minute (D) Signup and view all the answers

What is the main purpose of measuring the serum creatinine level in renal function tests?

To assess glomerular filtration (C) Signup and view all the answers

What is the purpose of the vasopressin test?

To assess the kidney's ability to concentrate urine (A) Signup and view all the answers

What is the main purpose of the urine dilution test?

To evaluate tubular reabsorption capacity (A) Signup and view all the answers

What is the significance of a specific gravity between 1010 and 1015 in the test described?

It indicates serious renal damage (B) Signup and view all the answers

Which of the following statements is true about the tubular maximum reabsorption and secretion (Tm)?

It estimates the maximum amount of a substance that can be reabsorbed or secreted by the tubules in one minute (A) Signup and view all the answers

In the urine dilution test, what is the significance of a urine output below 400 ml and a specific gravity above 1010?

It indicates severe renal damage (D) Signup and view all the answers

Which of the following conditions is a contraindication for the urine dilution test?

All of the above (D) Signup and view all the answers

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