Anatomy and Physiology

Osmoreceptors

Posted on
Osmoreceptors

Osmoreceptors are sensory receptor primarily found in hypothalamus ( located in vascular organ of lamina terminalis, a circumventricular organ ) of most homoeothermic organisms that detects changes in osmotic pressure. They contribute to osmoregulation controlling fluid balance in the body. They are defined functionally as neurons that have an intrinsic ability to detect changes in osmolality.

Anatomy and Physiology

Tubular Secretion

Posted on
Urine Formation (Tubular Secretion)

Tubular secretion is the transfer of materials from peri-tubular capillaries to the renal tubular lumen which is reversal of reabsorption.

This step is usually used to remove drugs, toxins and poisons, or other natural compounds in excessive amounts (such as potassium (K+), hydrogen (H+), and urea).

Anatomy and Physiology

Glomerular Filtration

Posted on
Glomerular Filtration

Urine formation begins with filtration of large amounts of fluid through glomerular capillaries into Bowman’s capsule. Glomerular Filtration takes place through the semipermeable walls of the glomerulus and glomerular capsule.

The filtrate in the glomerulus is very similar in composition to plasma with the important exceptions of plasma proteins and blood cells.