Nephron and Renal Physiology Quiz

All of the following structures lie in the renal medulla, except

• Juxtaglomerular apparatus

• Collecting duct

• Vasa Recta

• Loop of Henle

Answer explanation

True about nephron/ kidney is all except

• Each kidney contains 1 million nephrons

• DCT is 5mm long, 15% nephrons are juxtamedullary

• Effective renal plasma flow is 625 ml/min and inulin clearance is same

• GFR increases when afferent arteriole dilate and blood flow increases

All of the following statements about Renal physiology are true, Except:

• Distal tubule always receives hypoosmotic solution

• The kidneys receive 5% of the cardiac output

• GFR is controlled by resistance in afferent and efferent arterioles

• The Glomerulus receives capillaries from the afferent arteriole

Relaxation of mesangial cells of kidney is brought about by -

• CAMP

• Endothelin

• PGF2

• Vasopressin

Following cells are responsible for acid secretion in kidney-

• I cells

• P cells

• Mesangial cell

• Pericytes

Which of the following does NOT form a filtration barrier in nephrons:

• Podocytes

• Mesangium

• Endothelial cell

• Basement membrane

In a normal person, GFR is approximately:

• 125 ml/min

• 90 ml/min

• 60 ml/min

• 150 ml/min

Macula densa in kidney is located in relation to-

• PCT

• DCT

• Afferent arteriole

• Efferent arteriole

All organs have autoregulation of blood circulation except

• Kidneys

• Skeletal Muscles

• Heart

• Skin

Renin is secreted by :

• Mesangial cells

• DCT

• Macula densa

• JG cells