THE ENDOCRINE SYSTEM.
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Essay Subject:
Discusses functions of this group of glands.... More...
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Paper Abstract:
Discusses functions of this group of glands. Main function to secrete hormones into the bloodstream. Control of various bodily functions such as growth, glucose control, blood pressure regulation, development of secondary sexual characteristics. Actions of the pituitary gland.;feedback mechanism. Effect of hormones on organs and glands. Examples of feedback control.
Paper Introduction:
The Endocrine System
The endocrine system is a group of glands whose function is to secrete hormones directly into the bloodstream (Berkow, Beers and Fletcher, 1997). Hormones are substances which serve as messengers which control the various functions of the body such as growth and development, glucose control, salt and water regulation, red cell production, bone formation, blood pressure regulation, development of secondary sexual characteristics, and support pregnancy. The major endocrine organs are the pituitary, hypothalamus, thyroid, parathyroids, pancreas, adrenals, testes and ovaries. The hypothalamus secretes several hormones which stimulate the pituitary gland, which then releases certain of its hormones in response. It secretes others which suppress release of pituitary hormones.
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the variousfunctions of the body thyroid parathyroids pancreas adrenals testes and ovaries Thehypothalamus of pituitary hormones The pituitary is the major controlling secrete theirown hormones The pituitary in in the pancreas which secrete insulin in response torising blood but are notconsidered part of which are only secreted when is the highestearly in the morning specific glands when the levels A very tight control is kept on hypophagia and leanness with an TSH whengiven intracerebroventricularly MCH has also been shown to reduce Hormones may have rapid or delayed effects on their two hours and slow feedback after bothrapid and delayed feedback inhibition necessary for the feedbackcontrol of hormones role in the regulation of spermatogenesis in loop controlling testicularfunction Profiles of on day The second testis showed an be the percent decrease in circulating that inphysiological situations FSH concentrations are unable to stimulatespermatogenesis to less robust than the feedback loop inhibin B-FSH Adecrease control the release of hormones from the body are finely tuned by the endocrine system Station NJ Merck Research Laboratories Dayanithi Endocrinology Kennedy A R Todd J F Stanley hypothalamus and the pituitary Endocrinology Ramaswamy S Marshall G R into the bloodstream Berkow Beers and Fletcher blood pressureregulation development of secondary sexual characteristics and supportpregnancy The releases certain of its hormones the hormones the pituitary secretes act of the other hormones Some ofthe endocrine glands medulla whichresponds directly to parasympathetic stimulation by the nervous system nervous system only Certain hormones are produced at a baby and causes release Berkow Beers and Fletcher These twoglands which inhibit these glandsfrom producing their hormones when the peptide encodedin the pre-pro MCH gene Kennedy et to profound suppression of thisaxis MCH can suggest thatMCH has a role in ACTH by theanterior pituitary by rapid feedback within receptor mediating the rapid and delayedfeedback responses They found that types ofdelayed feedback require the synthesis of new Plant Theylooked at the dynamics of the follicle-stimulating testicularhypertrophy seen in response to unilateral orchidectomy and to describethe on the dayof and at various times after unilateral orchidectomy secretion was noted The stimulus sperm output by the monkeytestis is regulated feedback system in which the toward their spermatogenic maximum The above data show adelicate balance of releasing and H Fletcher A J Endocrine hormone release are mediated by type II glucocorticoidreceptors and require hormone MCH suppresses thyroid stimulating hormone TSH in regulating spermatogenesis in the adult male Rhesusmonkey Macaca mulatta The Endocrine System The endocrine system is a group such as growth and development glucose control saltand water regulation secretes several hormones which stimulate gland which coordinates many ofthe functions of the turn is controlled by a sugar levels the parathyroid cells which respond tocirculating calcium the endocrine system For instance the brain producesmany needed Berkow Beers and Fletcher For instance prolactin and the lowest in mid-afternoon Hormone secretion is regulated hormones produced by those glandsare circulating hormone levels in thisway inappropriately highmetabolic rate The hypothalamic pituitary-thyroid axis thyroidreleasing hormone-stimulated TSH from pituitary cells in target organs orglands Dayanithi and Antoni showed severalhours They looked at the rapid and delayed feedback of ACTH release by the pituitary aremediated by type II in the endocrine system Another example of feedback control in Rhesusmonkeys The study was carried out to document the circulating concentrations of FSH LH testosterone inhibin B and pro increase innumber of all germ cells more mature inhibinB following unilateral orchidectomy Transient changes its maximum The results also indicated that in the inhibin B feedback signal resulted the pituitary andthus the secretion through itsmaster gland the pituitary G Antoni F A Rapid as well as S A Abbott C R McNeilly A S Plant T M Dynamics Hormones are substances which serve as messengers which control major endocrine organs are the pituitary hypothalamus in response It secretesothers which suppress release directly ontissues and others stimulate the other endocrine glands to operate independently of the pituitary gland theislets of Langerhans Some organs also secrete hormones and hormone-like substances varying times such as the hormonesinvolved with pregnancy and lactation ofmilk The production of corticosteroids and growth hormone respond to circulating hormone levels and release hormones whichstimulate levels in the bloodstream are toohigh al Deletion of this genecauses a phenotype of rapidly reduce plasma thyroid stimulating hormone the control of energy homeostasis through inhibition ofthe thyroid-pituitary axis minutes of application bydelayed feedback at one to the effects of corticosteroids on mRNA and protein This studydemonstrates the specificity of receptors hormone FSH inhibin Bfeedback loop and its response in the endocrine feedback for days Theother testis was taken for FSHsecretion was presumed to by circulating FSH concentrations and feedforward arm FSH-inhibin B is how the feedback control system works in theendocrine system to inhibiting feedback controls thefunctions of systemand hormones In Merck Manual of Medical Information pp Whitehouse newly synthesized messenger ribonucleic acid as wellas protein release in vivo and invitro via the as revealed by unilateral orchidectomy Endocrinology of glands whose function is to secretehormones directly red cell production bone formation the pituitary gland which then other endocrine glands Berkow Beers and Fletcher Some of feedbackmechanism responding to circulating levels and phosphate levels and the adrenal hormones which are distributed in the production bythe pituitary is stimulated by the suckling of by a feedback system controlling thepituitary and hypothalamus low in the bloodstream and release hormones Melanin-concentrating hormone MCH is an orexigenic is important inenergy homeostasis and starvation leads culture indicating it disrupts the pituitary-thyroid axis These data that glucocorticoid hormonesuppresses the release of adrenocorticotrophic hormone systems to determinethe type of glucocorticoid glucocorticoid receptors and that both the endocrine system wasinvestigated by Ramaswamy Marshall McNeilly and morphological changesin the seminiferous epithelium that underlie the compensatory C were monitored in blood samples before than undifferentiated spermatogoniaand a sustained increase in FSH were seen in LH andtestosterone levels This study suggests that FSHsecretion is controlled by a in a sustained increasein FSH secretion that drove the testes of hormones by the other endocrine organs Using References Berkow R Beers M delayedinhibitory effects of glucocorticoid hormones on pituitaryadrenocorticotrophic Small C J Ghatei M A Bloom S R Melanin-concentrating of follicle-stimulating hormone FSH inhibin B feedbackloop and its role the variousfunctions of the body thyroid parathyroids pancreas adrenals testes and ovaries Thehypothalamus of pituitary hormones The pituitary is the major controlling secrete theirown hormones The pituitary in in the pancreas which secrete insulin in response torising blood but are notconsidered part of which are only secreted when is the highestearly in the morning specific glands when the levels A very tight control is kept on hypophagia and leanness with an TSH whengiven intracerebroventricularly MCH has also been shown to reduce Hormones may have rapid or delayed effects on their two hours and slow feedback after bothrapid and delayed feedback inhibition necessary for the feedbackcontrol of hormones role in the regulation of spermatogenesis in loop controlling testicularfunction Profiles of on day The second testis showed an be the percent decrease in circulating that inphysiological situations FSH concentrations are unable to stimulatespermatogenesis to less robust than the feedback loop inhibin B-FSH Adecrease control the release of hormones from the body are finely tuned by the endocrine system Station NJ Merck Research Laboratories Dayanithi Endocrinology Kennedy A R Todd J F Stanley hypothalamus and the pituitary Endocrinology Ramaswamy S Marshall G R into the bloodstream Berkow Beers and Fletcher blood pressureregulation development of secondary sexual characteristics and supportpregnancy The releases certain of its hormones the hormones the pituitary secretes act of the other hormones Some ofthe endocrine glands medulla whichresponds directly to parasympathetic stimulation by the nervous system nervous system only Certain hormones are produced at a baby and causes release Berkow Beers and Fletcher These twoglands which inhibit these glandsfrom producing their hormones when the peptide encodedin the pre-pro MCH gene Kennedy et to profound suppression of thisaxis MCH can suggest thatMCH has a role in ACTH by theanterior pituitary by rapid feedback within receptor mediating the rapid and delayedfeedback responses They found that types ofdelayed feedback require the synthesis of new Plant Theylooked at the dynamics of the follicle-stimulating testicularhypertrophy seen in response to unilateral orchidectomy and to describethe on the dayof and at various times after unilateral orchidectomy secretion was noted The stimulus sperm output by the monkeytestis is regulated feedback system in which the toward their spermatogenic maximum The above data show adelicate balance of releasing and H Fletcher A J Endocrine hormone release are mediated by type II glucocorticoidreceptors and require hormone MCH suppresses thyroid stimulating hormone TSH in regulating spermatogenesis in the adult male Rhesusmonkey Macaca mulatta
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