Function of Loop of Henle

Q. If Henle's loop were absent from mammalian nephron, which of the following is to be expected:

1. There will be no urine formation
2. The urine will be more concentrated
3. The urine will be more dilute
4. There will be hardly any change in the quality and quantity of urine formed

Q.

Fill in the gaps:
Ascending limb of Henle’s loop is ___ to water whereas the descending limb is___ to it.

Reabsorption of water from distal parts of the tubules is facilitated by hormone ___

Dialysis fluid contains all the constituents as in plasma except ___

A healthy adult human excretes (on an average) ___ gm of urea/day.

Q. Which among the following statement(s) is/are true?
I. Descending limb of Henle’s loop is permeable to water.
II. Ascending limb of Henle’s loop is permeable to electrolytes.
III. Descending limb of Henle’s loop is permeable to electrolytes.
IV. Reabsorption is minimum in Henle’s ascending loop region.

1. III is true
2. I and IV are true
3. I and III are true
4. I, II and IV are true

Q. As glomerular filtrate moves through the ascending loop of Henle, the filtrate becomes more dilute: why?

1. The ascending loop of Henle is permeable to water and ions
2. The ascending loop of Henle is permeable to ions but impermeable to water
3. The ascending loop of Henle is impermeable to water and ions
4. The ascending loop of Henle is permeable to water but not to ions

Q. If Henle's loop were absent from mammalian nephron, which of the following is to be expected?

1. There will be no urine formation
2. There will be hardly any change in the quality and quantity of urine formed
3. The urine will be more concentrated
4. More amount of water and electrolytes will be present in urine

Q. Shapes of Henle's loop and vasa recta are

1. Hairpin shaped and 'U' shaped respectively
2. 'U' shaped and 'C' shaped respectively
3. 'U' shaped and hairpin shaped respectively
4. 'C' shaped and 'U' shaped respectively

Q. Which one of the following statements in regard to the excretion by the human kidneys is correct?

1. Descending limb of loop of Henle is impermeable to water.
2. Distal convoluted tubule is incapable of reabsorbing bicarbonate ions
3. Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules.
4. Ascending limb of loop of Henle is impermeable to electrolytes.

Q.

How is Nacl returned to the interstitium?

Q. Counter current mechanism helps in concentrating urine in animals and mainly operates on
a. Henle’s loops b. Vasa – recta
c. $PCT$ d. $DCT$

1. All of these
2. b only
3. a only
4. a and b

Q.

Draw a labelled diagram showing reaborption and secretion fo major substances at different parts of the nephron.

Q. The medullary interstitial fluid has a very high osmolarity which is maintained by:

1. Movement of NaCl from descending limb of Henle's loop into medullary interstitium
2. Uric acid and H+ present in interstitium
3. Movement of $K^{+}$ and $C{l}^{–}$ from DCT into peritubular capillaries
4. Movement of urea from PCT into medullary interstitium

Q. Consider that there are two different types of nephrons. Nephron A has proximal convoluted tubule, Henle’s loop, distal convoluted tubule and collecting duct. Nephron B has the same segments except for Henle’s loop. Which among the following will be expected?

1. Urine formed in nephron B is more concentrated
2. Urine formed in nephron B is more dilute
3. No urine is formed in nephron B
4. None of the above

Q.

Indicate whether the following statements are true or false:
Henle’s loop plays an important role in concentrating the urine.

Q. The main function of Henle's loop is:

1. Filtration of blood
2. Formation of urine
3. Passage of urine
4. Conservation of water

Q.

Which one of the following statements in regard to the excretion by the human kidneys is correct?

1. Ascending limb of Loop of Henle is impermeable to electrolytes

2. Descending limb of Loop of Henle is impermeable to water

3. Nearly 99 percent of the glomerular filtrate is reabsorbed by the renal tubules

4. Distal convoluted tubule is incapable of reabsorbing HCO

Q.

What is the importance of having a long loop of henle and short loop of henle.

Q. Main function of loop of Henle is

1. absorption of sugar
2. absorption of water
3. absorption of sodium
4. secretion of ions

Q. If Henle's loop were absent from mammalian nephron, which of the following is to be expected?

1. There will be no urine formation
2. There will be hardly any change in the quality and quantity of urine formed
3. The urine will be more concentrated
4. More amount of water and electrolytes will be present in urine

Q. The primary function of the loop of Henle is the recovery of water and sodium chloride from the urine.

1. True
2. False

Q.

What happens to the useful substances which enter Proximal Convoluted Tubule (PCT)?

Q.

Fill in the gaps:

(a) Ascending limb of Henle’s loop is ____________to water whereas the descending limb is___________to it.

(b) Reabsorption of water from distal parts of the tubules is facilitated by hormone____________.

(c) Dialysis fluid contains all the constituents as in plasma except ________.

(d) A healthy adult human excretes (on an average) _______ gm of urea/day.

Q. The descending loop of Henle is impermeable to water.

1. False
2. True

Q. Which of the following is least likely to be present in glomerular filtrate (the filtrate produced by nephron before it enters the loop of Henle) of a healthy adult nephron?

1. Amino acid
2. Glucose
3. Electrolytes
4. Large molecular weight protein

Q. The main function of Henle's loop is:

1. Conservation of water
2. Filtration of blood
3. Formation of urine
4. Passage of urine

Q. Urea synthesis takes place in

1. Urinary bladder
2. Alimentary canal
3. Liver
4. Kidney

Q. Which is wrongly matched?

1. PCT - absorption of glucose, Na+, amino acids, chloride ion and H2O
2. Descending limb of loop of Henle - absorption of H2O and Na+
3. Ascending limb of loop of Henle - absorption of Na+ and Cl-
4. DCT - absorption of Na+ and Cl-ions

Q. Where are Malpighian corpuscles seen?

1. Medulla
2. Pelvis
3. Cortex
4. Pyramid

Q. Which is wrongly matched?

1. PCT - absorption of glucose, Na+, amino acids, chloride ion and H2O
2. Descending limb of loop of Henle - absorption of H2O and Na+
3. Ascending limb of loop of Henle - absorption of Na+ and Cl-
4. DCT - absorption of Na+ and Cl-ions

Q. Name the structural and functional units of the kidney.

Q. Main function of descending limb of loop of Henle is