Many adults living in the US become curious about doctor prescribed growth hormone replacement therapy when they begin to experience chronic symptoms, such as low energy, fatigue and low sex drive, that are frequently associated with your bodyâs declining growth hormone levels.
External, or exocrine, secretion is distinguished from internal, or endocrine, secretion. In external secretion the products elaborated by a gland are released into the external environment; the secretion first enters the glandular duct, from which it is discharged onto the surface of the body or into hollow organs.
endocrine glands secrete hormones directly into the bloodstrem. exocrine glands like sweat gland salivary glands, tear etc, secrete outside the body. the brain or rather the pâ¦ituitary gland secretes Gh ( growth hormone) and other homones that target specific glands and tissues of the body.