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.
Exocrine glands are named apocrine glands, holocrine glands, or merocrine glands based on how their products are excreted. 1  Merocrine secretion â cells excrete their substances by exocytosis; for example, pancreatic acinar cells. 2  Apocrine secretion â a portion of the cell membrane that contains the excretion buds off.xocrine glands are one of two types of glands in the human body, the other being endocrine glands, which secrete their products directly into the bloodstream.