Excretory Products and their Elimination

Identify the correct statement regarding urine formation

• Counter current mechanism works around the glomerulus and PCT

• To prevent diuresis, ADH facilitates water reabsorption
  from the latter parts of the tubule

• Maximum absorption of electrolytes occurs in the Henle's loop

• A decrease in blood pressure can increase the glomerular filtration rate

• A decrease in blood pressure can increase the glomerular filtration rate

Choose the wrong statement regarding urine formation

• Filtration is non-selective process performed by glomerulus

• The glomerular capillary blood pressure causes filtration of blood through three layers

• GFR in a healthy individual is approximately 125 ml/min

• A fall in GFR activates the JG cells to release renin

• A fall in GFR activates the JG cells to release renin

Vasa recta refers to

• rectum region of the insects

• blood capillaries in invertebrates

• a fine blood capillary network of afferent arteriole

• a fine capillary which runs parallel to Henle's loop

• a fine capillary which runs parallel to Henle's loop

Find the wrongly matched pair.

• Balanoglossus - Proboscis gland

• Earthworm - Nephridia

• Grasshopper - Malpighian tubules

• Prawn - Flame cells

• Prawn - Flame cells

The condition in which the kidneys fail to conserve water leading to water loss and dehydration due to impaired ADH synthesis or release is

• Grave's disease

• Addison's disease

• Diabetes insipidus

• Cretinism

• Cretinism

In mammals, ammonia produced by metabolism is converted into urea in the

• Kidney

• Liver

• Spleen

• Blood

• Blood

Read the following statements and choose the correct option

(i) The glomerular filtration rate in a healthy individual is about 180 ml per day.

(ii) All the constituents of the plasma pass into the lumen of Bowman's capsule.

(iii) 70/80% of electrolytes and water are reabsorbed in the PCT.

(iv) Angiostesin II increases the glomerular blood pressure and GFR.

(v) The counter current systems contribute in concentrating the filtrate.

• (i) and (ii) only are correct

• (v) alone is correct

• (ii), (iii) and (iv) only are correct

• (iii), (iv) and (v) only are correct

• (iii), (iv) and (v) only are correct

The parts labeled as (A), (B), (C), (D) and (E) of renal corpuscle represents

• A - Afferent arteriole; B - Efferent arteriole; C - Glomerulus; D - Bowman's capsule; E - Proximal convoluted tubule

• A - Efferent arteriole; B - Afferent arteriole; C - Glomerulus; D - Bowman's capsule; E - Proximal convoluted tubule

• A - Proximal convoluted tubule ; B - Efferent arteriole; C - Glomerulus; D - Bowman's capsule; E - Distal convoluted tubule

• A - Afferent arteriole; B - Efferent arteriole; C - Bowman's capsule; D - Glomerulus; E - Proximal convoluted tubule

• A - Afferent arteriole; B - Efferent arteriole; C - Bowman's capsule; D - Glomerulus; E - Proximal convoluted tubule

Excretory structures in Rotifers are

• Green glands

• Malpighian tubules

• Flame cells

• Gills

• Gills

Which of the following factors is responsible for the formation of concentrated urine?

• maintaining hyperosmolarity towards inner medullary interstitium in the kidneys.

• Secretion of erythropoietin by Juxtaglomeular complex.

• Hydrostatic pressure during glomerular filtration

• low levels of antidiuretic hormone