Hormones in plants and human reproduction GapFill

Human sexual characteristics are all controlled by  hormoneseggsspermenzymesenvironmental factorsnerves. During  pubertyexercisechildhoodsleepbreastfeedingreproduction, hormones are produced for the first time, causing the development of  hormonalsecondarytemporarytertiaryseasonalprimary sexual characteristics, such as growth of body hair and  increased volumedecreased speeddecreased volumelossheighteningdeepening of the voice.

The main sex hormone in females is  LHadrenalineserotoninprogesteronetestosteroneoestrogen, whilst in males it is  testosteronecortisoladrenalineoestrogenserotonininsulin. Oestrogen and progesterone play a role in maintaining the lining of the  heartarteriesuterusovariesmusclesbreasts during the  fertilisationfertilitycardiacperiodfeedbackmenstrual cycle, which repeats every approximately  22014401828 days. In addition, FSH and  LHADHIVFHIVDNAATP stimulate the maturation and release of an egg from the ovary.

Human fertility can be controlled through the use of contraception. Methods of contraception include using artificial hormones to prevent the maturation or release of an egg, or the use of  gatewallfencebarrierstoppageblockade methods to prevent  pollenspermbloodseedsenzymeshormones coming into contact with an egg. Surgical cutting methods can also be used, restricting the movement of the egg to the uterus or sperm from the testicles.

Plants produce hormones, though they do not have glands as animals do. They use the hormones to control their (growth and how they coordinate themselves. Plants can respond to light or to gravity using the plant hormone  ethenegibberellininsulinauxinadrenalineLH, which causes unequal growth rates in roots and shoots due to uneven distribution across the plant. The response to light is known as  phototropismgeotropismvisiotropismraytropismsuntropismlictotropism whilst the response to gravity is known as  downtropismfalltropismphototropismgeotropismarbotropismearthotropism.