ABP stands for "Androgen-binding protein". ABP is a glycoprotein (beta-globulin) produced by the Sertoli cells in the seminiferous tubules of the testis. ABP causes testosterone to bind with spermatocyte cells (spermatogonia, primary spermatocytes, secondary spermatocytes, spermatids). Testosterone is necessary for proper sperm production.
Q: Does LH and FSH come from the anterior or posterior portion of the pituitary gland? Answer: Both FSH and LH are synthesized by cells within the anterior pituitary gland. GnRH is produced by cells of the hypothalamus. From Wikipedia... The anterior pituitary contains five types of endocrine cell, and they are defined by the hormones they secrete:
Q: What is the composition of prostatic fluid, the fluid produced and released by the prostate gland? Answer (from Wikipedia)... The function of the prostate is to secrete a slightly alkaline fluid, milky or white in appearance, that in humans usually constitutes roughly 30% of the volume of the semen along with spermatozoa and seminal vesicle fluid.[4]Semen is made alkaline overall with the secretions from the other contributing glands, including, at least, the seminal vesicle fluid.[5] The alkalinity of semen helps neutralize the acidity of the vaginal tract, prolonging the lifespan of sperm. The prostatic fluid is expelled in the firstejaculate fractions, together with most of the spermatozoa. In comparison with the few spermatozoa expelled together with mainly seminal vesicular fluid, those expelled in prostatic fluid have better motility, longer survival and better protection of the genetic material. In human prostatic secretions, the protein content is less than 1% and includes proteolytic enzymes, prostatic acid phosphatase, beta-microseminoprotein, andprostate-specific antigen. The secretions also contain zinc with a concentration 500–1,000 times the concentration in blood. |
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May 2016
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