Final answer:
The indented portion of the kidney where vessels and nerves enter and exit is called the hilum. The cortex does not cover the capsule; instead, the capsule surrounds the kidney's cortex. The other parts mentioned, such as nephrons, glomerulus, and renal pelvis, have different roles within the kidney.
Step-by-step explanation:
The indented portion of the kidney is referred to as hilum. This concave area serves as the entry and exit point for blood vessels, nerves, and the ureter. The other options provided in the question pertain to different parts of the kidney's structure: nephrons are the functional units that make up the renal cortex and handle the filtration and absorption processes; the glomerulus is part of the nephron where blood filtration begins; and the renal pelvis collects urine from the major and minor calyces before it passes into the ureter.
Regarding the statements about the kidney, the statement saying the cortex covers the capsule (c) is false because it is actually the capsule that covers the cortex. The kidney capsule is a tough fibrous layer surrounding the external surface of the kidney, while the cortex is the outer layer of the kidney tissue just beneath the capsule. All the other statements (a, b, and d) are true.