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Human Kidney and Urine Formation

Description: kidney urine BiologyBiology
Number of Questions: 15
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The tube which connects kidney to urinary bladder is called

  1. urethra

  2. ureter

  3. calyx

  4. collecting duct


Correct Option: B
Explanation:

Ureter carries the urine from kidney to urinary bladder. #

Which of the following glands rest(s) on the top of the kidney?

  1. Pancreas

  2. Adrenal glands

  3. Thyroid gland

  4. Pineal gland


Correct Option: B
Explanation:

Adrenal glands are situated on top of each kidney.

Which area of kidney controls the amount of salt and water in the urine?

  1. Cortex

  2. Medulla

  3. Hilus

  4. Pelvis


Correct Option: B
Explanation:

The innermost part of kidney, medulla controls the amount of salt and water in the urine.

Henle's loop is located ___________ proximal convoluted tube (PCT).

  1. before

  2. after

  3. underneath

  4. across


Correct Option: B
Explanation:

Henle's loop is located after PCT.

A depression in the kidney where renal artery enters and renal vein and ureter leave is called

  1. mesoarchium

  2. medulla

  3. hilus

  4. cortex


Correct Option: C
Explanation:

Hilus is a notch in concave part of bean shaped kidney where renal artery enters and renal vein and ureter leave the kidney.

Which structure is the basic functional unit of kidney?

  1. Neuron

  2. Nephron

  3. Glomerulus

  4. Bowman's capsule


Correct Option: B
Explanation:

Nephrons are the functional unit of kidney. #

_______ are the cone-shaped kidney tissues.

  1. Papillae

  2. Calyces

  3. Renal pyramids

  4. Renal columns


Correct Option: C
Explanation:

Renal pyramids are cone-shaped kidney tissues.

The hollow funnel in the outlet of the kidney, into which urine is discharged before entering the ureter, is called

  1. renal papilla

  2. renal pelvis

  3. calyx

  4. renal pyramid


Correct Option: B
Explanation:

Renal pelvis is the enlarged upper end (hollow funnel-shaped) of the ureter which is the tube which carries urine from kidney to urinary bladder.

Which tissue separates renal pyramids?

  1. Renal papilla

  2. Renal column

  3. Renal capsule

  4. Renal hilus


Correct Option: B
Explanation:

Renal columns are bands of granular tissue separating adjacent renal pyramids. The renal columns contain vessels and urinary tubes that run to the cortex.  They are supposed to be the extension of cortex into medulla.

What is the concentration of glucose present in the urine of a normal man?

  1. 1 mg/l

  2. 0.5 mg/l

  3. 0 mg/l

  4. 10 mg/l


Correct Option: C
Explanation:

The urine of a normal person contains no glucose. #

Name the ducts which deliver urine by peristalsis to the surface of the renal papillae and into the minor calyces.

  1. Major calyces

  2. Papillary ducts

  3. PCTs

  4. DCTs


Correct Option: B
Explanation:

Papillary ducts are the largest and distal portions of the collecting duct system within each renal pyramid which deliver urine by peristalsis to the surface of the renal papillae and into the minor calyces.

What is meant by renal threshold value?

  1. Volume of urine formed per day by kidney

  2. Concentration of a substance in blood above which the kidneys begin to remove it

  3. Amount of urine that kidneys can hold

  4. The maximum life of a kidney


Correct Option: B
Explanation:

The concentration of a substance in blood above which the kidneys begin to remove it is called the renal threshold value.

What is meant by medullary interstitium?

  1. It is the medullary extension of the renal cortex in between the renal pyramids.

  2. It is the functional space in the kidney beneath the individual fibres.

  3. It is a dense fibrous connective tissue sheath which surrounds the kidney.

  4. It is the inner layer of the kidney which contains some portions of the renal tubules and most of the collecting duct tubules of the kidney.


Correct Option: B
Explanation:

The medullary interstitium is the functional space in the kidney beneath the individual filters (glomeruli), which are rich in blood vessels. The interstitium absorbs fluid recovered from urine.

Which tube of nephron absorbs only Cl and Na ions?

  1. Proximal convoluted tubule

  2. Henle's loop

  3. Distal convoluted tubule (IDCT)

  4. Collecting tubule


Correct Option: C
Explanation:

DCT only absorbs Na+ and Cl.

What is the function of Bowman's capsule?

  1. It reabsorbs glucose, amino acids, phosphate, potassium, urea and other organic solutes from the filtrate.

  2. It is the functional unit of kidney.

  3. It filters blood to form urine.

  4. It makes urine more concentrated.


Correct Option: C
Explanation:

Bowman's capsule performs the first step in the filtration of blood to form urine. It allows liquids and small solid particles to pass through but prevents larger structures (e.g. blood cells) from passing through.

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