### process | secretion | hormone | sex hormone:

Androgen
* All androgens appear to act on same receptors, but tissue sites vary in absorption and metabolism.
* affect brain structure and function
  - the growth and function of the male reproductive organs
* also affect behavior
  - inhibit their own transformation into estrogen in the ovary
* are a group of hormones, of which testosterone is the most powerful
  - neglected topic when it comes to non-reproductive actions on brain
  - also responsible for other changes in the genitals of boys
  - available combined with estrogen, for replacement therapy
  - converted to estrogen in various parts of a man's body, including bone
  - hormones that stimulate the sebaceous glands and hair follicles in the skin
* are important for maintaining bone density and sex drive
  - normal male sexual development before birth and during puberty
  - in male sexual development around birth and at puberty
  - known to promote leanness and increased growth
  - male hormones that are present in both men and women, but are higher in men
* are male hormones, like testosterone
  - the most common being testosterone
  - neuroprotective in the dentate gyrus of adrenalectomized female rats
  - principally responsible for stimulating hair growth in both sexes
* are responsible for hair loss in women by the same mechanisms they cause hair loss in men
  - sexual differentiation in the fetus
  - sometimes helpful in raising the hematocrit
  - steroid hormones
  - steroids, such as testosterone
  - substances, usually hormones, responsible for male sex characteristics
  - the male hormones that cause beard growth, a deep voice and increased muscle mass
* are the male sex hormones, but they are also normally present in women
  - very potent chemicals
* can accelerate bone maturation without producing compensatory gain in linear growth
  - also potentially adversely affect the patient's lipid profile
  - cause retention of sodium and water
  - instruct the pituitary to decrease secretion of luteinizing hormone
  - trigger devastating changes in another hormone system important to aquatic life
* cause plug formation and increased sebum production.
* causes comb growth and condition, and has a function in the formation of albumen.
* continue to be produced mostly by the adrenal cortex.
* directly stimulate proliferation of bone cells in vitro.
* find use in the treatment of male hypogonadism regardless of the cause.
* help trigger the development of the testes and penis in the male fetus.
* increase sebaceous gland size and secretion rates, which can result in acne
  - sex drive in both men and women and also increase irritability
* induce the following changes in boys at the time of puberty.
* refers to male-life or masculinizing characteristics.
* regulate bone resorption activity of isolated osteoclasts in vitro.
* stimulate erythropoietin production by the kidney
  - the hormone-sensitive sebaceous glands, which produce oil, known as sebum
* target specific organs that have androgen receptors.

### process | secretion | hormone | sex hormone | androgen:

Adrenal androgen
* produce virilizing characteristics in genetic females.
* seem to have no physiological role in normal growth.

### process | secretion | hormone | sex hormone | androgenic hormone:

Nandrolone
* are anabolic steroids
  - drugs
* banned anabolic steroid that aids muscle growth.
* builds muscle and helps athletes recover faster in training.
* builds muscle, aiding strength and speed
  - but is easier on the liver than other steroids
* is an anabolic steroid used to enhance strength and power
  - androgenic hormone
  - on the Olympic Games list of banned substances
  - proven to be a progestin
  - quick to attach itself to natural steroid receptors in the body
* male hormone called androgen with minimal masculinizing effects.
* steroid often used by track and field athletes.