Which of the following is not the primary function of protonephridia?

1. Ionic volume regulation

2. Fluid volume regulation

3. Osmoregulation

4. Excretion

If one goes from the outer side to the inside of the kidney, which of the following parts comes first?

1. Hilum

2. Calyces

3. Pelvis

4. Cortex

Our excretory system has

1.Two million nephrons

2.One million nephrons

3.Two million neurons

4.One million neurons

For the ejection of urine the voluntary signal is given by

Micturition reflex is

How much of urea is excreted out per day?

Which of the following has no role in the elimination of excretory wastes?

How much Carbon dioxide is removed by lungs?

Haemodialysis

The blood drained from a convenient……… is pumped into a dialysing unit called……..