Consider the following water conservation mechanisms:
$A.$ Nasal countercurrent mechanism
$B.$ Dependence on metabolic water
$C.$ Highly hypertonic urine
$D.$ Living more on protein-rich diet
The kangaroo rat living in the desert can survive without drinking water because of:

  • A
    $A, B$ and $C$
  • B
    $A, B$ and $D$
  • C
    $B, C$ and $D$
  • D
    $A, C$ and $D$

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Analogy type question:
$(1)$ Blood filtered by kidneys per minute: $1100-1200 \text{ mL}$ :: $GFR$ in a healthy individual: ............
$(2)$ From sweat glands of the skin: Sweat is produced :: From sebaceous glands: ............

Why do we pass more urine in wet and cold seasons?

Find the incorrect option regarding the mechanism of urine formation in humans.

Assertion : Secreting hypotonic urine is effective in reducing urinary loss of water.
Reason : Hypotonic urine is more concentrated and higher in osmotic pressure than the blood.

Urea enters the nephron through . . . . . . .
$i$. Thicker segment of ascending limb of Henle's loop.
$ii$. Thinner segment of ascending limb of Henle's loop.
$iii$. Ultrafiltration into urinary space.
$iv$. Inner medullary segment of collecting tubule.
$v$. Outer medullary segment of collecting tubule.
Select the correct option.

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