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2 days ago · For example, it is the precursor molecule for the synthesis of vitamin D in the calcium metabolism and all steroid hormones, including the adrenal gland hormones cortisol and aldosterone, as well as the sex hormones progesterone, estrogens, and testosterone, and their derivatives. [7] [33]
2 days ago · Biologically, the sex hormones and associated neurotransmitters that act upon the nucleus accumbens (primarily testosterone, estrogen, and dopamine, respectively) regulate sex drive in humans. [4] Sexual drive can be affected by social factors such as work and family; psychological factors such as personality and stress; also by medical conditions, medications, lifestyle, relationship issues, and age.
5 days ago · The factors involved in the first appearance of the various hormones is largely a matter for conjecture, although hormones clearly are only one mechanism for chemical regulation, diverse forms of which are found in living things at all stages of development. Other mechanisms for chemical regulation include chemical substances (so-called organizer substances) that regulate early embryonic development and the pheromones that are released by social insects as sex attractants and regulators of ...
5 days ago · Hormone - LH, ICSH, Endocrine: Luteinizing hormone (LH; also called interstitial-cell-stimulating hormone, or ICSH) is another gonadotropin, a glycoprotein with a molecular weight of 26,000 in humans. In the female mammal it promotes the transformation, following release of the egg (ovulation), of the graafian follicle into the corpus luteum, an endocrine gland. In the male LH promotes the development of the interstitial tissue (Leydig cells) of the testes and hence promotes secretion of the ...
4 days ago · By the late 1990s, the NIMH team had demonstrated that women who regularly experience mood disorder symptoms just prior to their periods were abnormally sensitive to normal changes in sex hormones ...
2 days ago · As puberty begins and sex hormone levels rise, differences appear, though some changes are similar in males and females. Male levels of testosterone directly induce the growth of the genitals, and indirectly (via dihydrotestosterone (DHT)) the prostate. Estradiol and other hormones cause breasts to develop in females.
5 days ago · Hormone - Plant Growth, Photosynthesis, Reproduction: Growth in plants is regulated by a variety of plant hormones, including auxins, gibberellins, cytokinins, and growth inhibitors, primarily abscisic acid and ethylene. The distribution of auxins, which promote the lengthwise growth of plants, is correlated with the distribution of the growth regions of the plant. The most important auxin is β-indolylacetic acid (IAA), which is formed either from the amino acid tryptophan or from the ...
