Glossary of Terms & Definitions
Listed Alphabetically - "J"

Jaundice: A yellowish staining of the skin and whites of the eyes due to increased bilirubin (a bile pigment) levels in the blood. Jaundice can be an indicator of red blood cells rupturing (hemolysis), or disease of the liver or gallbladder.

Jejunum: The middle portion of the small intestine.

Joint kinesthetic receptor: The proprioceptive receptor located in a joint, stimulated by joint movement.

Juxtaglomerular apparatus (JGA): Consists of the macula densa (cells of the distal convoluted tubule adjacent to the afferent and efferent arteriole) and juxtaglomerular cells (modified cells of the afferent and sometimes efferent arteriole); secretes renin when blood pressure starts to fall.