Seborrheic dermatitis (Fig. 1) is a common chronic, superficial inflammatory disease of the scalp, face (especially the eyebrows and nasolabial folds), ears, and central chest, affecting 2% to 5% of the population. Clinically, the disease is characterized by thin erythematous plaques, often with a fine, greasy scale.eborrheic dermatitis (Fig. 1) is a common chronic, superficial inflammatory disease of the scalp, face (especially the eyebrows and nasolabial folds), ears, and central chest, affecting 2% to 5% of the population. Clinically, the disease is characterized by thin erythematous plaques, often with a fine, greasy scale.
the function of dendrons is that the dendron has dendrite on the end which receive impulses from receptor cells or other neurones which are then moved along the dendron to the axon.
Juxtaglomeruar Apparatus (JGA) consists of: 1) Juxtaglomerular cells (modified smooth muscle cells) of afferent arteriole including renin containing (synthesizes and stores renin) and sympathetically innervated granulated cells which function as mechanoreceptors to sense blood pressure.he macula densa senses the load and causes constriction of nearby afferent arteriole, increasing the resistance. This will return osmolality and filtrate flow rate to normal. Decreased renal arterial pressure leads to a decreased delivery of fluid (decreased osmolality or decreased flow rate) to the macula densa.