Excretory Products and their Elimination

If Henle's loop were absent from mammalian nephron, which one 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. The urine will be more dilute.

Conversion of ammonia to urea is done by

1. ornithine cycle
2. arginine cycle
3. fumaric cycle
4. citrulline cycle

Concentration of urine depends upon which organ?

1. Bowman's capsule
2. Length of Henle's loop
3. PCT
4. Network of capillaries arising from glomerulus

Which pair is correct?

1. Sebum = sexual attraction
2. Saliva = sense of food taste
3. Sweat = temperature regulation
4. Humerus = Hind leg