Question

Which of the following statements are false?
A) Outer cortex and inner medulla are the two zones in kidney
B) Medulla is divided into few renal pyramids
C) Pyramid projects into calyx
D) Inward extension of cortex between the pyramids is called renal column of Bertini

a) I and IV
b) II and IV
c) II and III
d)None of these

Answer 1

Hint: The cortex and medulla are the two parts of kidney internal layers and composed of nephrons (filtering units). Innermost region of the kidney is renal medulla which is arranged like a pyramid and contains various nephrons. Each pyramid point projects into calyx.

Complete answer:
Kidney (two bean shaped organs) lies in the retroperitoneal space. It is about 12 cm in length and each kidney is attached to the ureter. Nephron is the function unit of the kidney. There are about one million nephrons present in an adult human kidney.
Kidneys contain two structures: outer renal cortex and inner renal medulla.
Eight to eighteen renal lobes and each lobe contains the renal cortex surrounding the medulla portion called renal pyramid.
The tip of each pyramid empties urine into calyx.
Kidneys receive blood from renal arteries.
70% of genes expressed in adult kidneys.
Function of kidney
Helps in body homeostasis.
Regulates acid-base balance, electrolyte concentration, blood pressure and fluid volume.
Excrete varieties of waste product into urine followed by metabolism.

The correct answer is none of these.

Additional information:Renal column which is a medullary extension of the renal cortex in between the renal pyramids is known as Bertin column or column of Bertin.

Note:Right kidney is adjacent to liver and left kidney is adjacent to spleen
 (In males) Right kidney weight:- 80-160grams
                     Left kidney weight:- 80 - 175 grams
  (In females) Right kidney weight:- 40 - 175 grams
Left kidney weight: 35 - 190 grams