Spermatogenesis 0.0 / 5 ? BiologyAnimal physiologyInternational BaccalaureateOther Created by: Lotto65Created on: 16-10-17 18:33 What is spermatogenesis? Production of male gametes in the testes 1 of 23 What is oogenesis? Production of female gametes in the ovaries 2 of 23 What four processes do spermatogenesis and oogenesis have in common? Mitosis; Cell growth; Meiosis; Differentiation 3 of 23 What is the purpose of the mitosis stage? Produces large number of diploid cells 4 of 23 What is the purpose of the cell growth stage? So cells have enough resources to undergo two meiosis divisions 5 of 23 What is the purpose of the meiosis stages? Produce haploid cells 6 of 23 What is the purpose of the differentiation stage? So haploid cells develop into gametes with structures needed for fertilisation 7 of 23 Which cells divide by mitosis to produce diploid cells? Primordial germ cells or germinal epithelium cells 8 of 23 What do the diploid cells gain in growing? More cytoplasm 9 of 23 What are the cells called after cell growth? Primary spermatocytes 10 of 23 What do the primary spermatocytes do to produce? First division by meiosis to form two secondary spermatocytes 11 of 23 What do the secondary spermatocytes do and then produce? Second meiosis division to produce spermatids 12 of 23 What do the spermatids attach to that act as 'nurse cells'? Sertoli cells 13 of 23 What do sertoli cells do? Help spermatids develop into spermatozoa (differentiation); provide food and the right environment and surround them for meiosis 14 of 23 What do sperm cells do after development? Detach from sertoli cells and are carried out of the testes by fluid in the seminiferous tubule 15 of 23 What does the acrosome do on a sperm cell? Contains enzymes to digest the zona pelludica around the egg 16 of 23 What do the helical mitochondrion do? Produce ATP from aerobic respiration to supply energy for swimming and other processes in the sperm 17 of 23 What does the sperm tail do? Provides propulsion to allow the sperm to swim up the vagina, uterus and oviduct until it reaches the egg 18 of 23 What do protein fibres do? Strengthen the tail 19 of 23 What do microtubules do? In a 9+2 array causing the sperm tail to beat from side to side and generate forces to propel the sperm 20 of 23 What are the sperm cells called after the mitosis phase? Spermatogonium 21 of 23 What is added to the sperm cell at differentiation? Acrosome, midpiece and tail 22 of 23 What do interstitial cells do? Secrete testosterone 23 of 23
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