MCQ'S: Renal

Question 1

What renal blood flow is expected if the mean arterial pressure is 160 mmHg?

Answer 1

A renal blood flow of 1200 mls/minute is likely if the mean arterial pressure is 160 mmHg.

Renal blood flow is usually 25% of cardiac output, and is maintained by autoregulation, whilst mean arterial pressure remains in the range 80-200 mmHg

Question 2

Blood supply to the medulla is derived entirely from the vasa recta?

T/F

Answer 2

True.

Capillaries close to the boundary of the cortex and medulla loop into the medulla and form the vasa recta. These surround the Loop of Henle.

They are the only blood supply to the medulla.

Question 3

Macula densa are located where?

Answer 3

distal convuluted tubule.

Question 4

How much is renal oxygen consumption?

Answer 4

approximately 18 mls/min.

Question 5

How many nephrons would you expect each kidney to have?

Answer 5

each kidney contains approximately 1 million nephrons

Question 6

Which cells in the kidney contain brush border?

Answer 6

PCT

Question 7

Proximal tubular cells possess fewer mitochondria than distal tubular cells?

T/F

Answer 7

FALSE.

Proximal tubular cells are particulary rich in mitochondria.

Question 8

What percentage of nephrons are juxtramedullary?

Answer 8

20%

Question 9

Whats the width of the slit membrane of the Bowmans Capsule pores?

Answer 9

5 nm diameter