Question

Renal columns are ______.

A) internal cavities lined by the fibrous capsule
B) conical structures that are located in the renal medulla
C) expanded ends of the ureter
D) the basic foundation units of the kidney
E) bundles of tissue that extend between pyramids from the cortex

Answer 1

Renal columns are bundles of tissue that extend between pyramids from the cortex, separating the renal pyramids and renal papillae. They divide the kidney into lobes and provide support for vessels. The option (E) is correct.

Step-by-step explanation:

Renal columns are bundles of tissue that extend between pyramids from the cortex and serve to divide the kidney into lobes and provide support for vessels that enter and exit the cortex (the renal cortex is the outer region of the kidney).

These extensions of the renal cortex separate the renal pyramids and renal papillae, which are bundles of collecting ducts that transport urine made by nephrons to the calyces of the kidney for excretion. The renal columns also contain blood vessels and connective tissues. Therefore, option (E) is correct.