BIOLOGY 225 Lecture Notes - Lecture 6: Human Chorionic Gonadotropin, Seminiferous Tubule, Sertoli Cell
Document Summary
July 12, 2016: assures maintenance of species, all physiological activities are geared towards assuring reproductive success, primary reproductive organs. Ovaries (female) & testes (male: secondary reproductive organs. Reproductive ducts and glands sex change. Male reproductive system: seminiferous tubules functional unit of testis, endocrine function. Leydig cells produce testosterone (steroid diffuse out of cells and get into blood circulation) Sertoli cells produce protein hormone inhibin. Very important in regulation and stimulation of spermatogenesis: basal lamina forms blood-testis barrier. Inside environment is high in androgens, estrogens, k+, amino acids. Transport across barrier is regulated: reproductive tract. Seminal vesicles produce semen alkaline solution. Prostate gland slightly acidic solution: hypothalamus gnrh gonadotropins ovary & testes steroids, gonadotropin. Protein hormones produced by anterior pituitary gland. Control steroid hormone synthesis in gonads of vertebrates. Chorionic gonadotropin (present in females during pregnancy and not from pituitary: spermatogenesis occurs in seminiferous tubules, spermatozoa. Head contains nucleus w/ densely packed chromosome.
