What are the similarities and differences between endocrine and exocrine glands?
147180
Both endocrine and exocrine glands secrete substances. Exocrine glands have ducts and secrete a substance that acts right there. An example would be saliva secreted by salivary glands which starts digesting starch in the mouth. Endocrine glands are ductless and secrete hormones. Hormones are emptied in the intercellular space and go to the blood. Blood carry hormones away from the place they were produced.An example would be growth hormone secreted by the pituitary gland; one of growth hormone's target is bones.
67740
Exocrine gland\n\nFrom Wikipedia, \nthe free encyclopedia.\n(Redirected from Exocrine system)\nJump to: navigation, search\nExocrine gland refers to glands that secrete their products via a duct. This is as opposed to endocrine glands that release their products directly into the circulatory system via the capillary network. Typical exocrine glands include sweat glands, salivary glands, mammary glands and many glands of the digestive system.
936169
1.) Hyperthyroidism. Hyperthyroidism is defined as a disorder where excessive thyroid hormone is produced by the thyroid gland. If a substance similar to TSH is produced, then this substance would act similar to TSH in the body. Since TSH stimulates the thyroid to produce thyroid hormone, the increase in abnormal substance would cause an increase in thyroid hormone secretion. \n\n2.) Membrane-bound receptors are better for mediating rapid onset and short duration responses. Intracellular receptors are better for mediating long-term responses. This is because membrane-bound receptors only alter molecules in the cytoplasm of the cell, and these changes can easily be turned off by removing the ligand from the receptor. Intracellular receptors can sometimes pass through the nuclear envelop after binding a ligand and proceed to modify the DNA of the organism. This will result in long-term changes.\n\n3.) Phosphodiesterase (PDE) breaks down cAMP. If a drug inhibits PDE, then cAMP will not be broken down. When the hormone binds to the receptor and ultimately causes cAMP to be produced, the intracellular effect of cAMP will continue on indefinitely as it cannot be broken down.
111952
Well the endocrine system is a network,and they all affect eachother,however Pineal gland has an entirely different function from the Adrenals,the Adrenals primarily excrete cortisol and Adrenaline.Serotonin is a chemical in the brain that makes that happy feeling.In depressed people there is a deficiency of seretonin.
749611
*E. Steroids \n\n        1. Steroids differ from neutral fats; steroids have a backbone of four fused carbon rings; \n            vary according to attached functional groups. \n        2. Functions vary due primarily to different attached functional groups. \n        3. Cholesterol is a part of an animal cell’s membrane and a precursor of other steroids, including \n            aldosterone and sex hormones. \n        4. Testosterone is the male sex hormone. \n\n *Enzymes are proteins,  that act as organic catalysts to speed chemical reactions within cells. \n\n*Cellulose is glucose bonded to form microfibrils; primary constituent of plant cell walls.\n\n*Starch is straight chain of glucose molecules with few side branches. \n\n*A protein is any chain of amino acids.\n\n*Fats are triglycerides containing saturated fatty acids (e.g., butter is solid at room temperature).
790464
A secretory protein is any protein, whether it be endocrine or exocrine, which is secreted by a cell. Secretory proteins include many hormones, enzymes, toxins, and antimicrobial peptides.
131630
The endocrine system is a control system of ductless glands that secrete chemical messengers called hormones that circulate within the body via the bloodstream to affect distant organs. Hormones act as "messengers", and are carried by the bloodstream to different cells in the body, which interpret these messages and act on them. The endocrine system does not include exocrine glands such as salivary glands, sweat glands and glands within the gastrointestinal tract.\n\nThe field of medicine that deals with disorders of endocrine glands is endocrinology, a branch of the wider field of internal medicine.\n\nHypothalamus \nThyrotropin-releasing hormone (TRH) \nGonadotropin-releasing hormone (GnRH) \nGrowth hormone-releasing hormone (GHRH) \nCorticotropin-releasing hormone (CRH) \nSomatostatin \nDopamine \nPituitary gland \nAnterior lobe (adenohypophysis) \nGH (human growth hormone) \nPRL (prolactin) \nACTH (adrenocorticotropic hormone) \nTSH (thyroid-stimulating hormone) \nFSH (follicle-stimulating hormone) \nLH (luteinizing hormone) \nPosterior lobe (neurohypophysis) \nOxytocin \nADH (antidiuretic hormone) \nPineal gland \nMelatonin \nThyroid gland \nThyroxine (T4), a form of thyroid hormone \nTriiodothyronine (T3), a form of thyroid hormone \nCalcitonin \nParathyroid gland \nParathyroid hormone (PTH) \nHeart \nAtrial-natriuretic peptide (ANP) \nStomach and intestines \nGastrin \nSecretin \nCholecystokinin (CCK) \nSomatostatin \nNeuropeptide Y \nLiver \nInsulin-like growth factor \nAngiotensinogen \nThrombopoietin \nIslets of Langerhans in the pancreas \nInsulin \nGlucagon \nSomatostatin \nAdrenal glands \nAdrenal cortex \nGlucocorticoids - cortisol \nMineralocorticoids - aldosterone \nAndrogens (including testosterone) \nAdrenal medulla \nAdrenaline (epinephrine) \nNoradrenaline (norepinephrine) \nKidney \nRenin \nErythropoietin (EPO) \nCalcitriol \nSkin \nCalciferol (vitamin D3) \nAdipose tissue \nLeptin \n\nIn males only\nTestes \nAndrogens (testosterone) \n\nIn females only\nOvarian follicle \nOestrogens \nTestosterone \nCorpus luteum \nProgesterone \nPlacenta (when pregnant) \nProgesterone \nHuman chorionic gonadotrophin (HCG) \nHuman placental lactogen (HPL) \n\nRole in disease\nDiseases of the endocrine system are common, such as diabetes mellitus and thyroid disease.\n\nEndocrineopathies can occur with any of these. Hypofunction can occur as result of loss of reserve, hyposecretion, agenesis, atrophy, destruction, etc. Hyperfunction can occur as result of hypersecretion, loss of suppression, tumor, hyperplasia, etc.\n\nEndocrineopathies are classified as primary, secondary, or tertiary.\n\nPrimary is target organ dysfunction and is normally associated with increased or decreased secretory hormones. Secondary is a dysfunction that originates elsewhere like the pituitary gland and is normally associated with increased or decreased production of trophic factors. Tertiary is associated with dysfunction of the hypothalamus and its releasing hormones.\n\nDiffuse Endocrine System\nOrgans aren't the sole way for hormones to be sent into the body; there are a host of specific cells which secrete hormones independently. These are called the "diffuse" endocrine system, and include myocytes in the heart (atria) and epithelial cells in the stomach and small intestines. In fact, if one were to classify any chemical excretions in the term "hormone," every cell in the human body could be considered a part of the endocrine system.
116232
Your endochrine glands. It is your thyroid and adrenal glands that release pheromones and control their production.
215056
The endocrine system produces hormones and works with the circulatory system - that carries them. The nervous system works with the respiratory system and every other system in the body; such as the gastrointestinal system and reproductive systems.
1187954
A quick trip to Yahoo! Reference revealed that the pancreas is a small, irregularly shaped organ that resides between your stomach and your spine. The pancreas has two primary purposes: to secrete enzymes into your digestive system that help break down carbohydrates and protein, and to produce hormones that help maintain normal blood sugar levels. \nThe pancreas is technically part of the endocrine system, though it plays an important role in the digestive system as well. The endocrine system is a collection of glands, including your pituitary, thyroid, and adrenal glands, that secrete hormones to monitor your metabolism and cell growth, among many other things.
155592
No, a characteristic of hormones is that they are secreted by endocrine glands in the extracellular space; from there they go to the blood. Blood transfers them to their target cells/organs which is where they act. For example, insuline secreted by the islets of Langerhans, the endocrine part of the pancreas, is one of the hormone that controls glucose level in the blood.\nOn the other hand, substances secreted by exocrine glands such as salivary glands and mucous glands, act in the place they are synthesized. Saliva gives moisture to the food and starts digesting starch in food.
281014
Pituitary gland is a small oval endocrine gland that lies at the base of the brain. It is sometimes called the master gland of the body because all the other endocrine glands depend on its secretions for stimulation
41590
Hormonal control is based on the ENDOCRINE SYSTEM. Nervous system control is based on the NERVOUS SYSTEM.\n\nBoth rely on the parts of the brain for control.\nEndocrine or hormonal control is handled through a number of glands like the pituitary gland, the thyroid glansd, adrenal gland and numerous others. These all have a feedback loop that continually adjust levels of certain hormones. These hormones control everything from water balance, blood pressure and sleep cycle to sex drive and reproduction.\n\nThe nervous system has sensory neurons and motor neurons. Some are auromatically controlled while others are voluntary. Some like breathing are both.  Nervous control is impacted by hormonal control and the two systems interact often to maintain homeostasis of the human body.
197196
I am no doctor, but I believe that endocrine system diseases are caused by internal factors. However, there are diseases that could have a negative effect on the endocrine system. \n\nCheck this site for more info: http://www.answers.com/endocrine+system&r=67
943224
The endocrine system  regulates mood, growth and development, tissue function, metabolism, and sexual function and reproductive processes.It is in charge of body processes that occur slowly. The most imporant parts of the endocrine system are hormones and glands. Hormones transfer information and instructions from one set of cells to another and only affect certain cells. Glands produce and secrete chemicals. A gland selects and removes materials from the blood, processes them, and secretes the finished chemical product for use somewhere in the body.
504341
The endocrine system is all about hormones, and the nervous system coordinates the activity of the muscles, monitors the organs, constructs and also stops input from the senses, and initiates actions.
777407
This is a good question, but let's define "important" as "necessary for organismal survival".  In this case, both are EQUALLY important.  The endocrine function of the pancreas is to secrete insulin and glucagon which help to lower and raise the blood sugar levels, respectively.  Blood sugar level homeostasis is necessary for human survival.  On the other hand, the exocrine pancreas secretes trypsinogen, chymotrypsinogen, carboxypeptidase, pancreatic lipase, pancreatic amylase, and other substances which aid in the digestion of carbohydrates, proteins, and fats.  Obviously, this is a function which is also necessary to human survival.  You simply can not live with only one of these pancreatic functions operational and so it appears that neither function takes precedence over the other.  Again, very thoughtful and insightful question!