Question

The nephrons discharge their urine at the
A. Urinary bladder
B. Urethra
C. Renal pelvis
D. Renal pyramid

Answer 1

Hint: Excretory system removes the metabolic wastes from body fluid or blood. It also removes excess water in the body. The main excretory organ in humans is the bean-shaped kidney which is present in a pair.

Complete answer: In humans, the excretory system removes nitrogenous waste along with other metabolic wastes from the body. It consists of few parts, viz. a pair of kidneys, renal arteries and veins, ureters, urinary bladder, and urethra.
A vertical section of the kidney contains renal cortex, renal medulla, and renal pelvis.
The outermost region of the kidney is the cortex which contains Malpighian corpuscles of nephrons. The inner region is called the medulla.
The cone-shaped structures that make this part are called the renal pyramids.
Collecting ducts open and pyramids are connected with the ureter by the renal pelvis.

So, the correct option is C. Renal pelvis

Note: The kidneys open into the ureters at renal hilum. Ureters are tubes, each of which attaches to a kidney and carries urine from kidneys to the urinary bladder.
Ureters open into the urinary bladder which is a muscular sac. This urine is stored temporarily. When filled, it contracts and passes the urine to the urethra.
A thin, fibro-muscular tube called the urethra carries the urine from the urethra to the exterior.