In juxta-medullary nephrons,

Which of the following enters the hilum of the kidney?

Choose the correct option:
$(1)$ $ANF$ is secreted when blood pressure decreases / blood pressure increases.
$(2)$ Renal pyramids are located in the renal cortex / renal medulla.

Name the following:
Cortical portions projecting between the medullary pyramids in the human kidney.

The wall of the urinary bladder in humans shows a thick layer of smooth muscle called . . . . . . .

Select the correct statements from the following.
$(i)$ Renal papilla is a narrow tip of the medullary pyramid.
(ii) Renal cortex is red-coloured and striated.
(iii) Longitudinal-circular-longitudinal arrangement of smooth muscles is observed in the renal pelvis at its origin.
(iv) Ureter is a long,non-muscular hollow tube that communicates with the renal pelvis at its origin.