Question

multiple choice question
what is the innermost layer of kidney tissue called?
∘ meatus
∘ cortex
∘ medulla
∘ calyx

Explanation:

1. Analyze each option:

• Meatus: A meatus is a passage or opening, not a layer of kidney tissue. For example, the urethral meatus is the opening of the urethra, so this option is incorrect.
• Cortex: The cortex is the outer layer of the kidney tissue, involved in filtering blood, so it is not the innermost layer, eliminating this option.
• Medulla: The medulla is the innermost layer of the kidney tissue. It contains structures like renal pyramids that are involved in concentrating urine, so this is the correct option.
• Calyx: A calyx is a cup - shaped structure that collects urine from the renal pyramids, not a layer of kidney tissue, so this option is wrong.

Answer:

C. Medulla