The complete reabsorption of glucose occurs in the ........

Which of the following statement$(s)$ is/are true?
$(1)$ Urine is hypertonic in the distal convoluted tubule.
$(2)$ When the urine passes into the collecting tubule,it becomes hypotonic.
$(3)$ Urine is isotonic in the proximal convoluted tubule.
$(4)$ Urine becomes more and more hypotonic as it passes through Henle's loop.

The brush border is a characteristic of which of the following?

$I.$ Glucose $II.$ Amino acid $III.$ $Na^+$ $IV.$ Nitrogenous waste
Which of these are reabsorbed actively in the nephron?
Choose the correct option.

During urine formation,which of the following processes creates high osmotic pressure in the uriniferous tubule?

Name two actively transported substances in glomerular filtrate.