Tubular reabsorption begins when filtrate reaches

___________________________ is defined as a situation in  which one or both kidneys drop to a lower position in the lower back.

In the tubuloglomerular feedback mechanism, macula densa cells function by:

Juxtaglomerular cells monitor blood pressure in:

The male hormone testosterone is produced by ______________________ cells.

The macula densa contains cells that:

In the kidney, blood travels from the renal artery to the ____________________________ artery.

The kidney is described as a retroperitoneal organ. This means that:

The descending limb of the Loop of Henle:

The ________________________ is a layer of support tissue that anchors the kidney and adrenal glands to the surrounding tissues.