The apocrine sweat glands, associated with the presence of hair in human beings (as on the scalp, the armpit, and the genital region), continuously secrete a concentrated fatty sweat into the gland tube. Emotional stress stimulates contraction of the gland, expelling its contents.
What is the apocrine mode of secretion?
Apocrine secretion occurs when the release of secretory materials is accompanied with loss of part of cytoplasm. The secretory materials may be contained in the secretory vesicles or dissolved in the cytoplasm that is lost during secretion.
How do secretions of apocrine differ from those of eccrine?
Apocrine glands secrete a thick clear fluid whereas the eccrine glands secrete a clear thin watery sweat. This sweat released by the eccrine glands consists of more water and sodium chloride compound which imparts the salty taste to the sweat.
What are the contents and color of the sweat produced from the apocrine glands?
Chromhidrosis, or colored sweat, is due to the presence of lipofuscin pigment in sweat glands, most commonly apocrine sweat glands. This pigment can lead to the production of yellow, blue, green, or black sweat.
How do apocrine glands secrete their products?
The distinct characteristic of apocrine glands is that they secrete their product through decapitation, which entails membrane budding of the apical cytoplasm. This process involves 3 distinct phases.
What is Merocrine secretion?
Definition of merocrine : producing a secretion that does not contain cellular components and is discharged without major damage to the secreting cell also : produced by a merocrine gland.
What uses apocrine secretion?
A type of gland that is found in the skin, breast, eyelid, and ear. Apocrine glands in the breast secrete fat droplets into breast milk and those in the ear help form earwax. Apocrine glands in the skin and eyelid are sweat glands.
Where does apocrine secretion occur?
Apocrine glands are found primarily in the areolae of the breasts, anogenital region and axillae. Secretion occurs when the release of secretory materials is accompanied with loss of part of cytoplasm.
How do merocrine and apocrine sweat glands differ in structure and function?
Merocrine gland cells produce their product in cells which export the product into ducts which transfer the material to the skin surface. Apocrine glands differ by using exocytosis and actually secrete portions of the gland’s cells.
Are merocrine and eccrine the same?
Merocrine (or eccrine) is a term used to classify exocrine glands and their secretions in the study of histology. The term eccrine is specifically used to designate merocrine secretions from sweat glands (eccrine sweat glands), although the term merocrine is often used interchangeably.
What is apocrine sweat made of?
The apocrine sweat is cloudy, viscous, initially odorless, and at a pH of 6–7.5. It contains water, protein, carbohydrate waste material, and NaCl. The sweat only attains its characteristic odor upon being degraded by bacteria, which releases volatile odor molecules.
What do eccrine and apocrine glands secrete?
Eccrine sweat glands are abundantly distributed all over the skin and mainly secrete water and electrolytes through the surface of the skin. In 1987, however, apoeccrine glands were identified in areas of apocrine glands but secreted watery fluids similar to eccrine glands [194].
What is the composition of apocrine secretion?
Secretion from apocrine glands contains protein, lipid, carbohydrate, ammonium and other organic compounds. The ducts of the glands empty into an adjacent hair follicle.
What are apocrine sweat glands made of?
Apocrine Sweat Glands. They are characterized by a simple cuboidal epithelium and widely dilated lumen that stores the secretory product. Secretion from apocrine glands contains protein, lipid, carbohydrate, ammonium and other organic compounds. The ducts of the glands empty into an adjacent hair follicle.
Do the apocrine and eccrine glands produce different levels of urea and K+?
Under the same sweating conditions, urea and K+excretions from the apocrine glands were also higher than those from the eccrine glands (all P < 0.05). Significant differences were observed between the Na+secretions of the apocrine and eccrine glands under the running condition.
