PacSun USA Customer Service Phone Number. Phone Number of PacSun USA is +1 (714) 414-4909, (714) 414-4000 . Pacific Sunwear of California Incorporation is commonly known as PacSun. Pacsun is a leading company with Nationwide position in retailing industry.
type of sweat gland. in perspiration. When the body temperature rises, the sympathetic nervous system stimulates the eccrine sweat glands to secrete water to the skin surface, where it cools the body by evaporation. Thus, eccrine sweat is an important mechanism for temperature control.
Merocrine secretion - cells secrete their product through exocytosis and remain intact after secretion (digestive juices) Apocrine secretion - cells secrete their product by destroying their apex membrane so that the product flows out of the cell into the excretion duct; after secretion the cell regenerates its apex membrane (mammary gland) There is also another way - holocrine secretion in which the entire cell is destroyed in order to release the product (sebaceous glands)