{"id":186,"date":"2022-07-19T17:32:55","date_gmt":"2022-07-19T17:32:55","guid":{"rendered":"https:\/\/futura.study\/blog\/?p=186"},"modified":"2022-07-19T17:32:55","modified_gmt":"2022-07-19T17:32:55","slug":"gli-ormoni","status":"publish","type":"post","link":"https:\/\/futura.study\/blog\/materie\/biologia\/gli-ormoni\/","title":{"rendered":"GLI ORMONI"},"content":{"rendered":"<h3><b>Cosa succede quando ci innamoriamo? Lavorano gli ormoni!<\/b><\/h3>\n<p><span style=\"font-weight: 400;\">Quando ci innamoriamo il nostro corpo viene colpito da una tempesta chimica; le fasi principali dell&#8217;innamoramento sono tre e ognuna \u00e8 guidata da ormoni diversi.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h3><strong>\u00a0\u2026<i>ma cosa sono gli ormoni?<\/i><\/strong><\/h3>\n<p><span style=\"font-weight: 400;\">Gli <\/span><i><span style=\"font-weight: 400;\">ormoni<\/span><\/i><span style=\"font-weight: 400;\"> sono messaggeri chimici, cio\u00e8 molecole che attivano reazioni all\u2019interno dell\u2019organismo producendo una risposta biologica.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Sono prodotti da <\/span><i><span style=\"font-weight: 400;\">ghiandole endocrine<\/span><\/i><span style=\"font-weight: 400;\"> e agiscono a basse concentrazioni legandosi a proteine localizzate a livello delle cellule bersaglio, i <\/span><i><span style=\"font-weight: 400;\">recettori<\/span><\/i><span style=\"font-weight: 400;\">. Il legame <\/span><i><span style=\"font-weight: 400;\">ormone-recettore<\/span><\/i><span style=\"font-weight: 400;\"> agisce come una chiave nella serratura: apre la porta (scatena una reazione intracellulare) solo se la chiave \u00e8 quella giusta. Legandosi al <\/span><i><span style=\"font-weight: 400;\">recettore<\/span><\/i><span style=\"font-weight: 400;\">, l\u2019<\/span><i><span style=\"font-weight: 400;\">ormone<\/span><\/i><span style=\"font-weight: 400;\"> ne determina una variazione strutturale e quindi una serie di cambiamenti all\u2019interno della cellula.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gli <\/span><i><span style=\"font-weight: 400;\">ormoni<\/span><\/i><span style=\"font-weight: 400;\"> permettono di soddisfare le esigenze di <\/span><i><span style=\"font-weight: 400;\">omeostasi<\/span><\/i><span style=\"font-weight: 400;\">, <\/span><i><span style=\"font-weight: 400;\">metabolismo<\/span><\/i><span style=\"font-weight: 400;\">, <\/span><i><span style=\"font-weight: 400;\">bilancio idrico<\/span><\/i><span style=\"font-weight: 400;\"> ed <\/span><i><span style=\"font-weight: 400;\">elettrolitico<\/span><\/i><span style=\"font-weight: 400;\"> e <\/span><i><span style=\"font-weight: 400;\">soddisfacimento dei cicli biologici<\/span><\/i><span style=\"font-weight: 400;\">.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Gli <\/span><i><span style=\"font-weight: 400;\">ormoni<\/span><\/i><span style=\"font-weight: 400;\"> identificati sono 50 e a seconda della loro struttura molecolare si distinguono in:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">proteine e peptidi<\/span><\/i><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">steroidi<\/span><\/i><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">derivati dagli amminoacidi<\/span><\/i><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">derivati dagli acidi grassi polinsaturi<\/span><\/i><span style=\"font-weight: 400;\">.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Possono essere ulteriormente classificati in:<\/span><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">idrosolubili<\/span><\/i><span style=\"font-weight: 400;\">: peptidi o derivati di amminoacidi che interagiscono con <\/span><i><span style=\"font-weight: 400;\">recettori<\/span><\/i><span style=\"font-weight: 400;\"> posti all\u2019interno della membrana delle cellule bersaglio<\/span><\/li>\n<li><span style=\"font-weight: 400;\"> \u00a0 \u00a0 \u00a0 <\/span><i><span style=\"font-weight: 400;\">liposolubili<\/span><\/i><span style=\"font-weight: 400;\">: molecole lipidiche, quindi <\/span><i><span style=\"font-weight: 400;\">idrofobiche<\/span><\/i><span style=\"font-weight: 400;\">, che possono attraversare il doppio strato fosfolipidico e legare <\/span><i><span style=\"font-weight: 400;\">recettori<\/span><\/i><span style=\"font-weight: 400;\"> intracellulari.<\/span><\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<p><span style=\"font-weight: 400;\">Ecco una lista di alcuni importanti <\/span><i><span style=\"font-weight: 400;\">ormoni<\/span><\/i><span style=\"font-weight: 400;\"> da ricordare:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>cortisolo<\/i><\/b><span style=\"font-weight: 400;\">: liberato dalla <\/span><i><span style=\"font-weight: 400;\">corticale del surrene<\/span><\/i><span style=\"font-weight: 400;\">, ha un&#8217;azione iperglicemizzante e antinfiammatoria<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>testosterone<\/i><\/b><span style=\"font-weight: 400;\">: prodotto dalle <\/span><i><span style=\"font-weight: 400;\">cellule di Leydig<\/span><\/i><span style=\"font-weight: 400;\"> (poste nello stroma dei testicoli) e responsabile dello sviluppo dell\u2019apparato riproduttore maschile e dello sviluppo dei caratteri sessuali primari e secondari. Contribuisce, inoltre, alla corretta produzione dello sperma\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>progesterone<\/i><\/b><span style=\"font-weight: 400;\">: liberato dalle <\/span><i><span style=\"font-weight: 400;\">ovaie<\/span><\/i><span style=\"font-weight: 400;\">, prepara l\u2019utero all\u2019impianto dell\u2019uovo fecondato e alla gestazione\u00a0<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>glucagone<\/i><\/b><span style=\"font-weight: 400;\">: prodotto dalle <\/span><i><span style=\"font-weight: 400;\">cellule alfa<\/span><\/i><span style=\"font-weight: 400;\"> delle <\/span><i><span style=\"font-weight: 400;\">isole di Langerhans<\/span><\/i><span style=\"font-weight: 400;\"> del <\/span><i><span style=\"font-weight: 400;\">pancreas<\/span><\/i><span style=\"font-weight: 400;\">, ha un&#8217;azione iperglicemizzante<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>insulina<\/i><\/b><span style=\"font-weight: 400;\">: prodotto dalle <\/span><i><span style=\"font-weight: 400;\">cellule beta<\/span><\/i><span style=\"font-weight: 400;\"> delle <\/span><i><span style=\"font-weight: 400;\">isole di Langerhans<\/span><\/i><span style=\"font-weight: 400;\"> del <\/span><i><span style=\"font-weight: 400;\">pancreas<\/span><\/i><span style=\"font-weight: 400;\">, ha un&#8217;azione speculare a quella del <\/span><i><span style=\"font-weight: 400;\">glucagone<\/span><\/i><span style=\"font-weight: 400;\"> (sono antagonisti). La sua \u00e8 una funzione ipoglicemizzante<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>ADH<\/i><\/b><span style=\"font-weight: 400;\"> o ormone antidiuretico o vasopressina: liberato dall&#8217;<\/span><i><span style=\"font-weight: 400;\">ipotalamo<\/span><\/i><span style=\"font-weight: 400;\"> causa la ritenzione d\u2019acqua a livello renale. In caso di disidratazione dell\u2019organismo porta alla produzione di urina pi\u00f9 concentrata e all\u2019aumento della pressione sanguigna<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>LH<\/i><\/b><span style=\"font-weight: 400;\"> e <\/span><b><i>FSH<\/i><\/b><span style=\"font-weight: 400;\">: rispettivamente ormone luteinizzante e ormone follicolo stimolante, entrambi liberati dall&#8217;<\/span><i><span style=\"font-weight: 400;\">adenoipofisi<\/span><\/i><span style=\"font-weight: 400;\">, controllano l\u2019attivit\u00e0 delle gonadi, sia maschili che femminili<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\" aria-checked=\"false\"><b><i>GH<\/i><\/b><span> o ormone della crescita o somatotropina: prodotto dall&#8217;<\/span><i><span>adenoipofisi <\/span><\/i><span>e responsabile dell\u2019accrescimento dell\u2019individuo dal punto di vista osseo, muscolare e ponderale<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Cosa succede quando ci innamoriamo? Lavorano gli ormoni! Quando ci innamoriamo il nostro corpo viene colpito da una tempesta chimica; le fasi principali dell&#8217;innamoramento sono tre e ognuna \u00e8 guidata&#8230;<\/p>\n","protected":false},"author":1,"featured_media":189,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"content-type":"","footnotes":""},"categories":[2],"tags":[15],"class_list":{"0":"post-186","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-biologia","8":"tag-biologia"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>GLI ORMONI - Futura Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/futura.study\/blog\/materie\/biologia\/gli-ormoni\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GLI ORMONI - Futura Blog\" \/>\n<meta property=\"og:description\" content=\"Cosa succede quando ci innamoriamo? 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