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Why Is The Pancreas Both An Endocrine And An Exocrine Gland?

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Follow us at: https://plus.google.com/+tutorvista/ Check us out at http://www.tutorvista.com/content/bio... Exocrine Glands Exocrine glands are glands that secrete their products (excluding hormones and other chemical messengers) into ducts (duct glands) which lead directly into the external environment. They are the counterparts to endocrine glands, which secrete their products (hormones) directly into the bloodstream (ductless glands) or release hormones (paracrines) that affect only target cells nearby the release site. Exocrine glands contain a glandular portion and a duct portion, the structures of which can be used to classify the gland. The duct portion may be branched (called compound) or unbranched (called simple). The glandular portion may be tubular, acinar, or may be a mix of the two (called tubuloacinar). If the glandular portion branches, then the gland is called a branched gland. Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. The main endocrine glands include the pituitary gland, pancreas, ovaries, testes, thyroid gland, and adrenal glands. The hypothalamus is a neuroendocrine organ. Other organs which are not so well known for their endocrine activity include the stomach, which produces such hormones as ghrelin. Local chemical messengers, not generally considered part of the endocrine system, include autocrines, which act on the cells that secrete them, and paracrines, which act on a different cell type near by. Please like our facebook page http://www.facebook.com/tutorvista

Which Gland Works Both As An Endocrine And Exocrine Gland?

PANCREAS The pancreas is a dual-function gland, having features of both endocrine and exocrine glands. Endocrine: The part of the pancreas with endocrine function is made up of cell clusters called islets of Langerhans. They play an imperative role in glucose metabolism and regulation of blood glucose concentration. Exocrine: pancreas also functions as an exocrine gland that assists the digestive system. It secretes pancreatic fluid that contains digestive enzymes that pass to the small intestine. These enzymes help to further break down the carbohydrates, proteins and lipids (fats) in the chyme. It’s the pancreas! The pancreas gland works both as endocrine and exocrine gland, because it is a glanduar organ in the upper abdomen, but really it serves as two glands in one : a digestive exocrine gland and hormone - producing endocrine gland functioning as an exocrine gland , the pancreas excretes enzymes to breakdown the proteins. Most people say that the pancreas is the only gland that is both endocrine and exocrine. But, the liver also functions as both. It is normally classified as an exocrine gland because it secretes bile into the intestine. The pituitary gland releases growth Continue reading >>

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  1. 2 answers

    Explain why the pancreas is considered both an exocrine and endocrine gland.?

    Endocrine glands secrete something (hormones) into the blood stream, and there is NO duct involved. That is the definition of endocrine function; ductless secretion.
    Exocrine function is by definition secretion of something via a duct.
    The pancreas gland makes insulin, glucagon, somatostatin, and pancreatic polypeptide, all of which are secreted into the blood stream without ducts, and are therefore endocrine hormones.
    The pancreas also makes digestive enzymes, which are collectively known as pancreatic juice, and are secreted into the duodenum of the small intestine through a duct. Therefore, this is an exocrine function.

  2. Joanne

    Production of Insulin- Endocrine. Elimination of wastes Exocrine.

  3. Guncrazy

    Because it secretes insulin and glucagon into the blood stream (endocrine function), and pancreatic juices (including amylase and lipase) into the digestive system (exocrine function).

  4. -> Continue reading
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Endocrine Pancreas

This page outlines information on the pancreas. Several hormones participate in the regulation of carbohydrate metabolism. Four of them are secreted by the cells of the islets of Langerhans in the pancreas: two, insulin and glucagon, with major actions on glucose metabolism and two, somatostatin and pancreatic polypeptide, with modulating actions on insulin and glucagon secretion. Other hormones affecting carbohydrate metabolism include: epinephrine, thyroid hormones, glucocorticoids, and growth hormone. Structure and Function of the Pancreas The pancreas lies inferior to the stomach, in a bend of the duodenum. It is both an endocrine and an exocrine gland. The exocrine functions are concerned with digestion. The endocrine function consists primarily of the secretion of the two major hormones, insulin and glucagon. Four cell types have been identified in the islets, each producing a different hormone with specific actions: * A cells produce glucagon; * B cells produce insulin; * D cells produce somatostatin; and * F or D1 cells produce pancreatic polypeptide. These hormones are all polypeptides. Insulin is secreted only by the B cells whereas the other hormones are also secreted by Continue reading >>

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  1. Biology

    Define hormone and classify them on basic their chemical nature?

  2. Biology

    What is the function of adernal gland

  3. Biology

    What is puccinia. Which type of Kingdom it belongs from.

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This endocrine system lecture explains the endocrine system anatomy and physiology and it also states about the structural anatomy of endocrine system consist of ductless glands that secrete hormones. This lecture explains about the chemical messengers called hormones secreted from the endocrine glands. Endocrine system anatomy and physiology lecture states the function of endocrine system and physiology of endocrine system by means of hormones biochemistry that regulates the body growth and metabolism. This lecture also states the structure and function of major glands of the endocrine system like hypothalamus, pituitary, thyroid, parathyroids, adrenals, pineal body, and the reproductive organs (ovaries and testes) and pancreas. For more information, log on to- http://www.shomusbiology.com/ Get Shomu's Biology DVD set here- http://www.shomusbiology.com/dvd-store/ Download the study materials here- http://shomusbiology.com/bio-material... Remember Shomus Biology is created to spread the knowledge of life science and biology by sharing all this free biology lectures video and animation presented by Suman Bhattacharjee in YouTube. All these tutorials are brought to you for free. Please subscribe to our channel so that we can grow together. You can check for any of the following services from Shomus Biology- Buy Shomus Biology lecture DVD set- www.shomusbiology.com/dvd-store Shomus Biology assignment services www.shomusbiology.com/assignment -help Join Online coaching for CSIR NET exam www.shomusbiology.com/net-coaching We are social. Find us on different sites here- Our Website www.shomusbiology.com Facebook page- https://www.facebook.com/ShomusBiology/ Twitter - https://twitter.com/shomusbiology SlideShare- www.slideshare.net/shomusbiology Google plus- https://plus.google.com/1136485849827... LinkedIn - https://www.linkedin.com/in/suman-bha... Youtube- https://www.youtube.com/user/TheFunsuman Thank you for watching the lecture video on endocrine system anatomy and physiology

Human Physiology/the Endocrine System

The endocrine system is a control system of ductless glands that secrete hormones within specific 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. It seems like a far fetched idea that a small chemical can enter the bloodstream and cause an action at a distant location in the body. Yet this occurs in our bodies everyday of our lives. The ability to maintain homeostasis and respond to stimuli is largely due to hormones secreted within the body. Without hormones, you could not grow, maintain a constant temperature, produce offspring, or perform the basic actions and functions that are essential for life. The endocrine system provides an electrochemical connection from the hypothalamus of the brain to all the organs that control the body metabolism, growth and development, and reproduction. There are two types of hormones secreted in the endocrine system: Steroidal (or lipid based) and non-steroidal, (or protein based) hormones. The endocrine system regulates its hormones through negative feedback, except in very specific cases like childbirth. Increases in hormone activity decrease Continue reading >>

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Popular Questions

  1. 2 answers

    Explain why the pancreas is considered both an exocrine and endocrine gland.?

    Endocrine glands secrete something (hormones) into the blood stream, and there is NO duct involved. That is the definition of endocrine function; ductless secretion.
    Exocrine function is by definition secretion of something via a duct.
    The pancreas gland makes insulin, glucagon, somatostatin, and pancreatic polypeptide, all of which are secreted into the blood stream without ducts, and are therefore endocrine hormones.
    The pancreas also makes digestive enzymes, which are collectively known as pancreatic juice, and are secreted into the duodenum of the small intestine through a duct. Therefore, this is an exocrine function.

  2. Joanne

    Production of Insulin- Endocrine. Elimination of wastes Exocrine.

  3. Guncrazy

    Because it secretes insulin and glucagon into the blood stream (endocrine function), and pancreatic juices (including amylase and lipase) into the digestive system (exocrine function).

  4. -> Continue reading
read more

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