Question

Characteristic of metanephric kidney is
a. Hypotonic urine
b. Uric acid formation
c. Loop of Henle
d. Hormone production

Answer 1

In humans one pair of kidneys is found, it is located behind the peritoneum in the abdomen at the both side of the vertebral column. The right kidney is situated slightly lower due to the presence of the liver.

Complete answer:
Kidneys are the major excretory organ of mammals that help in regulating the electrolyte balance in the body. They remove toxic and nitrogenous urea & ammonia waste from the body through urine. Ultrafiltration of the filtrates occurs in the glomerulus of the nephrons. Selective reabsorption of glucose and vitamins is performed through the active transport mechanism.

The permanent Kidney in reptiles, birds and mammals, developed by the 10th week in human embryos from the lower part of the wolffian duct, and replaced the embryonic structure, called the mesonephros. It consists of a paired organ, this paired organ having a number of nephrons, and a ureter, which is separated from the wolffian duct leads from the metanephros to the bladder. This metanephric kidney represents an extra segment which is known as Henle loop or Loop of henle. The main functions of this region are controlling urine concentration and conservation of water. Metanephric kidney release is always hypertonic solution and excretes urea and the kidney is not responsible for production of hormones, hormones always produced by the endocrine system of the body.

Hence, the correct answer is option (C).

Note: The conduction of the urine is directed through the countercurrent mechanism. It also helps in maintaining homeostasis by regulating the concentration of the electrolytes and the osmolarity of the body fluids. The daily output of urine in an adult human is about 1.5 to 1.8 liters.