| 单词 | spermatogenesis |
| 例句 | “It has been shown that high scrotal temperatures alter spermatogenesis,” said Mínguez-Alarcón, referring to the 90-day job that is sperm manufacture. Wearing boxer shorts boosts sperm count, scientists say 2018-08-08T04:00:00Z The Y chromosome's genes help govern crucial reproductive functions including sperm production, formally called spermatogenesis, and are even involved in cancer risk and severity. Scientists solve the genetic puzzle of sex-related Y chromosome 2023-08-23T04:00:00Z Compare spermatogenesis and oogenesis as to timing of the processes, and the number and type of cells finally produced. Concepts of Biology 2013-04-25T00:00:00Z The production of sperm is called spermatogenesis and the production of eggs is called oogenesis. Biology for AP Courses 2022-06-09T00:00:00Z They increase during puberty, activating characteristic physical changes and initiating spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z The word "spermatogenesis" — the process by which sperm cells develop — is not likely to crop up in daily conversation. Male fertility rates have plummeted. The NIH is spending millions to figure out why 2021-09-27T04:00:00Z There have been several studies/attempts to temporarily "pause" spermatogenesis using enzyme inhibitors but in nearly all trials the process was either not reversible for all men or only reversible for some. Winning the Campaign to Curb Teen Pregnancy 2016-07-19T04:00:00Z Some synthetic androgens suppress spermatogenesis at lower doses and with fewer side effects than testosterone. “Male contraceptive options haven’t changed since Elvis was thin”: These revolutionary alternatives to condoms are dragging male birth control into the 21st century 2016-04-21T04:00:00Z This inhibits the release of GnRH and FSH, which will cause spermatogenesis to slow down. Biology for AP Courses 2022-06-09T00:00:00Z Maintaining these normal concentrations of testosterone promotes spermatogenesis, whereas low levels of testosterone can lead to infertility. Anatomy and Physiology 2013-06-19T00:00:00Z "We will be looking at the complex genetic rulebook for making sperm, while also looking for hidden causes of infertility related to spermatogenesis," she said by phone. Male fertility rates have plummeted. The NIH is spending millions to figure out why 2021-09-27T04:00:00Z After thawing, the tissues were cultured - or grown in a lab dish - and spermatogenesis induced. Deep frozen testicle tissue used to produce babies in mice 2014-07-01T04:00:00Z In the past few years, though, biologists have opened up some new genetic and molecular leads for disrupting spermatogenesis, and there's optimism among reproductive scientists again. Live Chat: How Close Are We to Birth Control for Men? 2012-12-12T14:05:12Z Why are the diploid zygotes produced after fertilization of sperm cells produced by spermatogenesis not similar? Biology for AP Courses 2022-06-09T00:00:00Z Figure 27.8 Regulation of Testosterone Production The hypothalamus and pituitary gland regulate the production of testosterone and the cells that assist in spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z Studies in spermatogenesis, with especial reference to the "accessory chromosome." Studies in Spermatogenesis Part II Its function must, therefore, be confined to the process of spermatogenesis. Studies in Spermatogenesis Part I The observations of Seligmann and Shattock on the relation of spermatogenesis to the development of nuptial plumage in drakes probably receive their explanation from the above facts. Hormones and Heredity One of these cells remains a spermatogonium, and the other becomes a primary spermatocyte, the next stage in the process of spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z This same process occurs with FSH and inhibin to control spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z In Part I of this series of papers, the spermatogenesis of five species belonging to four different orders of insects was considered. Studies in Spermatogenesis Part II On the behavior of the nucleolus in the spermatogenesis of Periplaneta americana. Studies in Spermatogenesis Part I In one part of this organ the tubules were larger than elsewhere, and one of them exhibited spermatogenesis in progress. Hormones and Heredity Although haploid, early spermatids look very similar to cells in the earlier stages of spermatogenesis, with a round shape, central nucleus, and large amount of cytoplasm. Anatomy and Physiology 2013-06-19T00:00:00Z The initiation of spermatogenesis begins in boys, and girls begin ovulating and menstruating. Anatomy and Physiology 2013-06-19T00:00:00Z The central strand of the flagellum, the axial filament, is formed from one centriole inside the maturing sperm cell during the final stages of spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z In connection with these insect forms it is of interest to find in the spermatogenesis of Sagitta a body which stains like chromatin and behaves somewhat like the accessory chromosome. Studies in Spermatogenesis Part I In June and July spermatogenesis is active, and from August to October the formation of ripe spermatozoa is completed. Hormones and Heredity The epidermis is therefore growing while the spermatogenesis is taking place. Hormones and Heredity The process that begins with spermatogonia and concludes with the production of sperm is called spermatogenesis. Anatomy and Physiology 2013-06-19T00:00:00Z |
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