Science / Biology / Testosterone: Male sex hormone that stimulates sperm formation, promotes the development of the male duct system in the fetus, and is responsible for secondary sex characteristics such as facial hair growth.


Science / Biology / Hormones: Chemical substances that are produced in the endocrine glands and travel in the blood to target organs where they elicit a response. MORE

Klinefelter Syndrome

Science / Biology / Klinefelter Syndrome: In humans, a genetically determined condition in which the individual has two X and one Y chromosome. Affected individuals are male and typically tall and infertile. MORE

Anabolic Steroid

Health / Fitness / Anabolic Steroid: Synthetic chemical that mimics the muscle building characteristics of the male hormone testosterone. MORE


Science / Biology / Lipids: One of the four classes of organic macromolecules. Lipids function in the long-term storage of biochemical energy, insulation, structure and control. Examples of lipids include the fats, waxes, oils a MORE

Sex Hormones

Science / Biology / Sex Hormones: A group of steroid hormones produced by the adrenal cortex. Hormones that are produced in the gonads and promoted development and maintainence of the secondary sex characteristics and structures, prep MORE

Luteinizing Hormone (LH)

Science / Biology / Luteinizing Hormone (LH): A hormone secreted by the anterior pituitary gland that stimulates the secretion of testosterone in men and estrogen in women. MORE