Plasticiseverywhere,fromtheArcticicetovitalorgansinthehumanbody.Infact,previousestimatessuggestthattheaveragepersonswallowsacreditcard-worthofmicroscopicplasticparticles(颗粒)everyweek.Butnewresearchshowsthatthiscouldactuallybeanunderstatement.Microplasticsareplasticssmallerthan5millimeters,foundinindustrialwaste,beautyproducts...
31. The glands and organs mentioned in paragraph 3 are categorized according to (A) whether scientists understand their function (B) how frequently they release hormones into the body (C) whether the hormones they secrete influence the aging process (D) whether they secrete chemicals into the bl...
These organs are both external and internal. Together, they make, store, and ejaculate sperm, which fertilizes eggs produced by the female reproductive system in order to begin a pregnancy. The male reproductive system also produces hormones such as testosterone, which play a key role in male ...
(vapour) ;(ii)1deamination (of amino acids) ;2removal of nitrogen-containing part of amino acids ;3to produce urea ;4urea/ AW, passes into blood ;5breakdown of, hormones/ toxins/ drugs/ excess vitamins ;6breakdown of, worn out red blood cells ;7excretory products put in bile ; e.g...
31. The glands and organs mentioned in paragraph 3 are categorized according to (A) whether scientists understand their function (B) how frequently they release hormones into the body (C) whether the hormones they secrete influence the aging process ...
The endocrine system is composed of nine specialized glands (the pituitary, the thyroid, the four parathyroids, the two adrenals and the thymus) and a number of organs capable of producing hormones (including thepancreas,heart,kidneys,ovaries,testiclesand intestines). Thehypothalamus, which is not...
Hormones:The hormones are chemicals secreted by specialized organs that are called glands. The hormones act on the target site or target organ in the body to regulate physiological functions. In the absence of secretion of hormones, the body will not function properly....
response, causing females under stress to produce more of the trigger chemicals than do males under the same conditions. In several of the studies, when stressed-out female rats had their ovaries (the female reproductive organs) removed, their chemical responses became equal to those of the ...
gonad- a gland in which gametes (sex cells) are produced sex gland ductless gland,endocrine gland,endocrine- any of the glands of the endocrine system that secrete hormones directly into the bloodstream ovary- (vertebrates) one of usually two organs that produce ova and secrete estrogen and prog...
Each year, they renew their parts, adding new wood, leaves, roots, and reproductive organs. In theory, gingko trees should live forever. 5 相关知识点: 试题来源: 解析 B 【文章解析】本文主要介绍了银杏树的“长寿”及其原因,属于科普性质的短文。文章本身理解起来不难,但有的选项具有迷惑性,需要...