structure and function of thyroid gland pdf Tuesday, December 8, 2020 3:06:13 AM

Structure And Function Of Thyroid Gland Pdf

File Name: structure and function of thyroid gland .zip
Size: 2013Kb
Published: 08.12.2020

Ides M. In thyrocytes, cell polarity is of crucial importance for proper thyroid function. Many intrinsic mechanisms of self-regulation control how the key players involved in thyroid hormone TH biosynthesis interact in apical microvilli, so that hazardous biochemical processes may occur without detriment to the cell.

Service Unavailable in EU region

As it is known the endocrine system together with the nervous system enables other systems in the body to work in coordination with each other and protect homeostasis using hormones. Hormones secreted by the endocrine system are carried to target organs and cause affect through receptors. The thyroid gland is among the most significant organs of the endocrine system and has a weight of g. It is soft and its colour is red. This organ is located between the C 5 -T 1 vertebrae of columna vertebralis, in front of the trachea and below the larynx. It is comprised of two lobes lobus dexter and lobus sinister and the isthmus that binds them together Figure 1a. Capsule glandular which is internal and external folium of thyroid.

NCBI Bookshelf. The thyroid gland is a vital hormone gland: It plays a major role in the metabolism, growth and development of the human body. It helps to regulate many body functions by constantly releasing a steady amount of thyroid hormones into the bloodstream. If the body needs more energy in certain situations — for instance, if it is growing or cold, or during pregnancy — the thyroid gland produces more hormones. This organ medical term: glandula thyreoidea is found at the front of the neck, under the voice box. It is butterfly-shaped: The two side lobes lie against and around the windpipe trachea , and are connected at the front by a narrow strip of tissue. The thyroid weighs between 20 and 60 grams on average.

The thyroid , or thyroid gland , is an endocrine gland in the neck consisting of two connected lobes. The lower two thirds of the lobes are connected by a thin band of tissue called the thyroid isthmus. The thyroid is located at the front of the neck, below the Adam's apple. Microscopically, the functional unit of the thyroid gland is the spherical thyroid follicle , lined with follicular cells thyrocytes , and occasional parafollicular cells that surround a lumen containing colloid. The thyroid gland secretes three hormones: the two thyroid hormones — triiodothyronine T 3 and thyroxine T 4 — and a peptide hormone , calcitonin.

Thyroid Hormone Production and Function

Jump to content. The thyroid gland uses iodine from food to make two thyroid hormones: triiodothyronine T3 and thyroxine T4. It also stores these thyroid hormones and releases them as they are needed. The hypothalamus and the pituitary gland , which are located in the brain, help control the thyroid gland. The hypothalamus releases thyrotropin-releasing hormone TRH , which stimulates the pituitary gland to release thyroid-stimulating hormone TSH. When the hypothalamus and pituitary are working normally, they sense when:.

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Apr 20, SlideShare Explore Search You. Submit Search.

Control of the Thyroid Gland pp Cite as. TSH is chemically related to the pituitary gonadotropins, luteinizing hormone LH and follicle-stimulating hormone FSH , as well as to placental chorionic gonadotropin CG. TSH is synthesized by thyrotropes of the anterior pituitary and stored in secretory granules. TSH is released into the circulation in a regulated manner, binds to thyroid cells and activates them to release thyroid hormones. Unable to display preview. Download preview PDF.

The Thyroid Gland

Thyroxine is the main hormone secreted into the bloodstream by the thyroid gland. The production and release of thyroid hormones, thyroxine and triiodothyronine, is controlled by a feedback loop system that involves the hypothalamus in the brain and the pituitary and thyroid glands. The hypothalamus secretes thyrotropin-releasing hormone which, in turn, stimulates the pituitary gland to produce thyroid stimulating hormone. This hormone stimulates the production of the thyroid hormones, thyroxine and triiodothyronine, by the thyroid gland. This hormone production system is regulated by a feedback loop so that when the levels of the thyroid hormones thyroxine and triiodothyronine increase, they prevent the release of both thyrotropin-releasing hormone and thyroid stimulating hormone.

In this article, we will be looking at its anatomy, its cellular structure, its endocrine physiology and its clinical relevance. It is roughly butterfly-shaped, with two lobes wrapping around the trachea and connected in the middle by an isthmus. The thyroid gland is not usually palpable.

You and Your Hormones

The thyroid gland is a butterfly-shaped organ located in the base of your neck. It releases hormones that control metabolism—the way your body uses energy.

Thyroid Gland: Overview

Дэвид только что позвонил Стратмору и рассказал о немецком туристе. Новость не обрадовала коммандера. Выслушав подробности, он долго молчал. Дэвид, - сказал наконец Стратмор мрачным голосом, - обнаружение этого кольца - вопрос национальной безопасности. Я возлагаю эту задачу на. Не подведите .

 Вы действительно собираетесь пристрелить Грега Хейла. - Нет.  - Стратмор хмуро посмотрел на нее и двинулся к двери.  - Но будем надеяться, что он этого не узнает. ГЛАВА 76 У подъезда севильского аэропорта стояло такси с работающим на холостом ходу двигателем и включенным счетчиком. Пассажир в очках в тонкой металлической оправе, вглядевшись сквозь стеклянную стену аэровокзала, понял, что прибыл вовремя. Он увидел светловолосую девушку, помогающую Дэвиду Беккеру найти стул и сесть.

Navigation menu

Я сказала, что нашла его в парке. Я думала, что она мне заплатит, но ничего не вышло. Ну, мне было все равно. Я просто хотела от него избавиться. - Когда вы отдали ей кольцо.

 Да неужели. Ты сам его и убил. Я все. - Довольно, Грег, - тихо сказал Стратмор. Хейл крепче обхватил Сьюзан и шепнул ей на ухо: - Стратмор столкнул его вниз, клянусь. - Она не клюнет на твою тактику разделяй и властвуй, - сказал Стратмор, подходя еще ближе.

Стратмор вытащил из-под ремня мобильник и набрал номер. - Ты блефуешь, Грег. - Вы этого не сделаете! - крикнул Хейл.  - Я все расскажу. Я разрушу все ваши планы.

Когда он ее нашел, каблук его ботинка громко ударился о кафельную плитку пола. Сьюзан почувствовала, как напряглось все его тело.

Еще и собственная глупость. Он отдал Сьюзан свой пиджак, а вместе с ним - Скайпейджер. Теперь уже окаменел Стратмор.

Thyroid-Stimulating Hormone: Structure and Function

 Вы хотите сказать, что нашли этот номер.

Сиди себе в заднем салоне и докуривай окурки. Хорошенькая картинка. Беккер застонал и провел рукой по волосам.

0 Comments

LEAVE A COMMENT