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Excretory Products and their Elimination Test 23

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Excretory Products and their Elimination Test 23
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  • Question 1
    1 / -0
    Glomeruli are limited to
    Solution
    The correct option is A
    In humans cortical nephrons and juxtamedullary nephrons are present, The bowman's capsule and the glomerulus of a nephron are found in the cortical region of the kidney.
  • Question 2
    1 / -0
    Nephrons are related to_______.
    Solution
    The correct answer is option C
    Nephrons are the structural and functional units of kidney. kidneys are a part of the excretory system.
    Kidney , ureters , urinary bladder and urethra form the excretory system.
  • Question 3
    1 / -0
    Columns of Bertin are found in
    Solution
    Columns of Bertin are found in kidney. It is the extension of renal cortex in between the renal pyramid. It allows the better anchoring of renal cortex. It consists of lines of blood vessels and urinary tubes and a fibrous material. It seperates the renal pyramid.
    So, the correct answer is "kidney".

  • Question 4
    1 / -0
    In man, kidney is
    Solution
    Stages of kidney development: 
    • Pronephros is the earliest nephric stage in humans and constitutes the mature kidney in most primitive vertebrates.
    • Mesonephros develops by the formation of mesonephric tubules from the intermediate mesoderm, it is the principal excretory organ during early embryonic life (4—8 weeks). It gradually degenerates, although parts of its duct system become associated with the male reproductive organs.
    • Metanephros arises caudal to the mesonephros at five weeks of development; it is the permanent and functional kidney in higher vertebrates. It is derived from the intermediate mesoderm. The ureteric bud arises as a diverticulum from the Wollfian duct, close to the entrance to the cloaca and grows towards and inside the metanephric mesenchyme.

    So, the correct answer is 'Metanephros'.
  • Question 5
    1 / -0
    Kidney is differentiated into.
    Solution
    The correct answer is option B
    Each kidney is divided into cortex and medulla. The outer portion of the kidney is called as cortex and the inner portion is called medulla.
  • Question 6
    1 / -0
    The bunch of capillaries present in the Bowmans capsule is called
    Solution
    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. The blood enters the glomerulus under high pressure from the afferent arteriole and leaves through efferent arteriole. Due to the high pressure in the glomerulus the blood gets filtered.The rate at which blood is filtered through all of the glomeruli, and thus the measure of the overall renal function, is the glomerular filtration rate. So the correct answer is “glomerulus”.
  • Question 7
    1 / -0
    The position of kidneys is
    Solution
    The peritoneum is a membrane lining the abdominal cavity. The kidney is retroperitoneal in position because it lies behind the peritoneum in the abdominal cavity.
    So, the correct answer is 'Retroperitoneal'.
  • Question 8
    1 / -0
    Ducts of Bellini are found in.
    Solution
    • The papillary ducts of the kidneys are also known as the Ducts of Bellini. They are the excretory ducts of the uriniferous tubule of the kidneys. They open into the renal papilla. So, the correct answer is 'Kidney'.
  • Question 9
    1 / -0
    Which is not a zymogen
    Solution
    Inactive precursors of enzymes are known as proenzymes or zymogen granules. It undergoes a chemical change to get activated. Some examples are  Trypsinogen, Pepsinogen, Procollagenase but Angiotensin II is not an proenzyme but it is a vasoconstrictor that regulates blood pressure.
    So, the correct option is C.
  • Question 10
    1 / -0
    The number of uriniferous tubules in each kidney of man is
    Solution
    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'.
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