Bio 2600 physiology exam 2 chapter 17,15,11,9 Questions And Answers 2024

Bio 2600 physiology exam 2 chapter 17,15,11,9 Questions And Answers 2024 Mitosis - ANS-first stage of gametogenesis in which in which primordial germ cells develop into primary spermatocytes or primary oocytes Meiosis - ANS-cell divisions resulting in each gamete receiving 23 chromosomes (half of the 46 from the primary spermatocyte of primary oocyte) What's the difference between meiosis and mitosis? - ANS-- meiosis makes half the original amount of chromosomes and only happens in reproductive organs and creates sex cells - after two gametes join at fertilization, the cell grows repeatedly by mitosis. mitosis creates 2 identical cells What is the end result of meiosis - ANS-each gamete receives 23 chromosomes how is fetal sex determined - ANS-by the presence of absence of a Y chromosome - y leads to development of gonads(testes) in males and its absence leads to ovary production in females -xy = m / xx = f what is capacitation? - ANS-process by which sperm in female reproductive tract gains ability to fertilize egg how does an erection occur? - ANS-due to vascular engorgement -(relaxation of small arteries and passive occlusion of the veins_ results from inhibition of sympathetic input and stimulation of nonadrenergic, noncholinergic autonomic nerves nitric oxide released by the latter, causes relaxation of arterial smooth muscle via cGMP and consequently increased blood flow spermatogenesis - ANS