The stage of the ornithine cycle at which the arginase enzyme is used?

Select the $INCORRECT$ statement with reference to ultrafiltration.

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

Study the following statements and select the correct answer from the given options.
$i$. Diameter of afferent arteriole being smaller raises glomerular pressure for ultrafiltration.
$ii$. The colloidal osmotic pressure of blood is about $30 \ mmHg$ that opposes ultrafiltration.
$iii$. The arrangement of podocytes favours ultrafiltration.

The ultrafiltrate generated by the glomerulus contains all the constituents of blood plasma except:

Ornithine is converted into citrulline by which enzyme?