85% of the nephrons are located in which of the following: aCortes bAdjacent to the medulla cRenal Pelvis dMinor Calyx

To determine where 85% of the nephrons are located, we need to understand the anatomy of the kidney. Nephrons are the functional units of the kidney responsible for filtering blood and producing urine.

The kidney is divided into several regions, including the cortex, medulla, renal pelvis, and minor calyx. The cortex is the outer region of the kidney, while the medulla is the inner region. The renal pelvis is a funnel-shaped structure that collects urine from the nephrons, and the minor calyx is a cup-like structure that collects urine from the renal pelvis.

Based on the given options, we can eliminate the choices "Renal Pelvis" and "Minor Calyx" since they are structures involved in the collection of urine rather than the location of nephrons.

Now, we are left with two options: "Cortex" and "Adjacent to the Medulla." To determine the correct answer, we need to consider the distribution of nephrons in the kidney.

The majority of nephrons are indeed located in the cortex of the kidney. This is where the initial filtration of blood occurs. Therefore, the correct answer is "Cortex" (option a).

In conclusion, 85% of the nephrons are located in the cortex of the kidney.