Tag: zoology

Questions Related to zoology

Malpighian body is present in

zoology excretory system of human structure of nephron excretory system nephron

  1. Skin

  2. Kidney

  3. Testes

  4. Ovaries

Show answer
Correct Option: B
Explanation:

Nephrons are the cells of kidney which are composed of a renal corpuscle and a renal tubule.  The renal corpuscle is also known Malpighian body. It consists of cup like double walled structure known as Bowman’s capsule and the bunch of capillaries present in the Bowman’s capsule is known as glomerulus. It helps in filtration of blood at high pressure. So, the correct answer is 'Kidney'.

Marcello Malpighi after whom Malpighian tubules are named was born in

zoology excretory system of human structure of nephron excretory system nephron

  1. Germany

  2. Australia

  3. Austria

  4. Italy

Show answer
Correct Option: D
Explanation:

Malpighian tubules are excretory organs present in the cockroach. They lie freely in haemolymph. They remove excretory products from the haemolymph and open in the alimentary canal at the junction of the midgut and hindgut. In each cockroach, they are about 150 in number. The Malpighian tubule system is named after 17th-century anatomist Marcello Malpighi. He was born in Italy,

So, the correct answer is 'Italy'.

Macula densa is found in

zoology excretory system of human structure of nephron excretory system nephron

  1. Internal ear

  2. Kidney

  3. Liver

  4. Spleen

Show answer
Correct Option: B
Explanation:
Macula densa is found in the kidney. The nephron is the structural and functional unit of the kidney. Nephron has the following parts: Glomerulus, proximal convoluted tubule, the loop of Henle, distal convoluted tubule and collecting duct. Macula densa is the thickening where the distal tubule touches the afferent arteriole of the glomerulus.
So, the correct answer is 'Kidney'.

JGA (Juxta Glomerular Apparatus ), a sensitive region, which regulates the glomerular filtration rate is present near the 

zoology excretory system of human structure of nephron excretory system nephron

  1. DCT and PCT

  2. DCT and efferent arteriole

  3. DCT and afferent arteriole

  4. Loop of Henle's and DTC

Show answer
Correct Option: C
Explanation:

A) Henle's loop is present between DCT and PCT.

B) JGA is present between DCT and the afferent arteriole.
C) JGA is a special sensitive region formed by cellular modification in the distal convoluted tubule and the afferent arteriole at the location of their contact.
D) JGA is present between DCT and the afferent arteriole.
So the correct answer is 'DCT and afferent arteriole'.

Which part of Juxta medullary nephron is found in cortical region

zoology excretory system of human structure of nephron excretory system nephron

  1. Malpigian body

  2. Proximal convulated tubule

  3. Distal convulated tubule

  4. Loop of henle

Show answer
Correct Option: A
Explanation:

The Juxta medullary nephron is one in which the renal corpuscle (Malphigian corpuscle having the Malphigian body) is located in the cortex but near to the medulla and the other regions, such as the proximal convulated tubule, the loop of Henle, and the distal convulated tubule are located deeper in the medulla. The only region present in the cortex is malphigian body. So, the correct answer is A.

Juxtaglomerular apparatus is formed by ____ and ___

zoology excretory system of human structure of nephron excretory system nephron

  1. Bowman's capsule, Glomerulus

  2. PCT, Glomerulus

  3. DCT, Bowman's capsule

  4. DCT, Glomerulus

Show answer
Correct Option: D

Which of the following is not a part of the structure pf uriniferous tubule?

zoology excretory system of human structure of nephron excretory system nephron

  1. Collecting duct

  2. Loop of Henle

  3. Convoluted tubule

  4. Bowman's capsule

Show answer
Correct Option: A

Which is true about the difference between cortical and juxtamedullary nephrons?

zoology excretory system of human structure of nephron excretory system nephron

  1. Majority of nephrons ae juxtamedullary

  2. Glomeruli and loops of Henle and cortical nephrons lie completely in cortex

  3. The afferent arterioles of the juxtamedullary nephrons give rise to most of vasa recta

  4. Cortical nephrons lack vasa recta

Show answer
Correct Option: A

The maintenance of concentration gradient in the medullary interstitium is mainly done by?

zoology excretory system of human structure of nephron excretory system nephron

  1. Glucose and $Na^+$

  2. NaCl and Urea

  3. Amino acids and creatinine

  4. $Na^+$ and $Ca^{2+}$

Show answer
Correct Option: A

Podocytes are the cells, present in?

zoology excretory system of human structure of nephron excretory system nephron

  1. Cortex of nephron

  2. Inner wall of Bowman's capsule

  3. Outer wall of Bowman's capsule

  4. Wall of glomerular capillaries

Show answer
Correct Option: A
Explanation:

Podocytes are a type of cells in the Bowman's capsule of the nephrons in the kidneys that wrap around the capillaries of the glomerulus. The long processes or foot projections of the podocytes wrap around the capillaries and leave slits between them. Blood is filtered through these slits, each known as a slit diaphragm or filtration slit.