Tag: nephron

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Questions Related to nephron

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Malpighian body is found

  1. In kidney of vertebrates and is involved in the formation of urine

  2. In vertebrates and involved with filtration of blood

  3. In insects and involved in excretion

  4. In invertebrates and involved with filtration of blood
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Malpighian body is also called kidney corpuscle. Malpighian body is the structure at the beginning of a vertebrate nephron, consisting of a glomerulus and its surrounding Bowman's capsule. It mainly involved in filteration of blood. Thus, option B is correct.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Nitrogenous waste in the Malpighian tubule flows into

  1. Haemocoel

  2. Vacuole

  3. Intestine

  4. Duodenum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Malpighian tubules are excretory organs of insects like cockroach, grasshopper etc. These are blind ending excretory tubes which open into the alimentary canal near the junction of the midgut and hind gut. These tubules remove nitrogenous wastes from the haemolymph and also function in osmoregulation.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

The number of uriniferous tubules in each kidney of man is

  1. About 10,000

  2. About 5,000

  3. Cannot be calculated
  4. About 1.0 x 10$^6$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The excretory organ present in humans is called a kidney. The nephrons are the structural and functional units of the kidney. Nephrons are also called as uriniferous tubules. The body of the uriniferous tubule is composed of Renal corpuscle, Proximal convoluted tubule(PCT) Henle's loop and Distal convoluted tubule(DCT) and collecting duct. The number of uriniferous tubules in each kidney of man is about 1.0 x 1000000.
So, the correct answer is 'Option D'.
Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Malpighian body is present in

  1. Skin

  2. Kidney

  3. Testes

  4. Ovaries
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Marcello Malpighi after whom Malpighian tubules are named was born in

  1. Germany

  2. Australia

  3. Austria

  4. Italy
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Macula densa is found in

  1. Internal ear

  2. Kidney

  3. Liver

  4. Spleen
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice zoology excretory system of human structure of nephron excretory system nephron

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

  1. DCT and PCT

  2. DCT and efferent arteriole

  3. DCT and afferent arteriole

  4. Loop of Henle's and DTC
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Which part of Juxta medullary nephron is found in cortical region

  1. Malpigian body

  2. Proximal convulated tubule

  3. Distal convulated tubule

  4. Loop of henle
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

Juxtaglomerular apparatus is formed by ____ and ___

  1. Bowman's capsule, Glomerulus

  2. PCT, Glomerulus

  3. DCT, Bowman's capsule

  4. DCT, Glomerulus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The juxtaglomerular apparatus is a specialized structure formed by the distal convoluted tubule (DCT) and the afferent arteriole (which supplies the glomerulus).

Multiple choice zoology excretory system of human structure of nephron excretory system nephron

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

  1. Collecting duct

  2. Loop of Henle

  3. Convoluted tubule

  4. Bowman's capsule
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The uriniferous tubule consists of the nephron and the collecting duct. However, in some textbook definitions, the collecting duct is considered a separate structure from the nephron itself, making it the correct answer for 'not a part of the nephron'.