Download
hypothalamus n.
Skip this Video
Loading SlideShow in 5 Seconds..
Hypothalamus PowerPoint Presentation
Download Presentation
Hypothalamus

Hypothalamus

158 Vues Download Presentation
Télécharger la présentation

Hypothalamus

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. Hypothalamus By Lamaria Edwards, Jeremiah Fannings, Amado Gallo

  2. Hormones produced • thyroid stimulating hormone releasing hormone (TRH), follicle stimulating hormone releasing hormone (FSHRH), luteinizing hormone releasing hormone (LRH), and growth hormone releasing hormone (GHRH). CRH targets the adrenal glands. It triggers the adrenals to release adrenocorticotropic hormone (ACTH). ACTH functions to synthesize and release corticosteroids. TRH targets the thyroid where it functions to synthesize and release the thyroid hormones T3 and T4. FSH targets.

  3. Located • The hypothalamus is a small Cohn-shaped structure located in the brain that plays a central role in controlling our nervous system.

  4. Functions • It controls the autonomic nervous system, acts with the limbic system to regulate emotional and behavioral patterns, regulates eating and drinking, controls body temperature and regulates diurnal rhythms. It also controls pituitary gland secretions. • The hypothalamus receives input from the external and internal environment as well as having its own receptors. It receives stimuli from the somatic and visceral sense organs. These inputs travel via the medulla oblongata and reach the hypothalamus through innervation by fibres producing dopamine, adrenaline, noradrenaline, serotonin and acetylcholine as well as fibres releasing neuropeptides such as enkephalins, NPY, neurotensin, dynorphins and endorphins. • The release of hormones from the pituitary is therefore subject to many different stimuli from 'higher centres' acting on the hypothalamus.In response to stimuli such as stress, pain and emotions, the hypothalamus can exert effects on the anterior and posterior pituitary gland in order to respond rapidly to environmental change as well as to feedback from internal systems

  5. Targets • The thyroid targets the ovaries and the testes where it enables the maturation of the ovum and of spermatozoa. LRH also targets the ovaries and the testes, and its receptors are in cells which promote ovulation and increase progesterone

  6. · A picture of where the hypothalamus is located

  7. · The hormone(s) produced by your endocrine gland • One of the most important functions of the hypothalamus is to link the nervous system to the endocrine system via the pituitary gland (hypophysis

  8. · The stimulus that tells your gland to produce hormones. • Pituitary glands,mood & behavioral functions,wakefulness,metabolism,sleep cycles,energy levels/ etc.

  9. The control mechanism that tells the hypothalamus to stop producing hormones

  10. The function of the hormone produced by the hypothalamus • Thyrotropin-releasing hormone (TRH)When it reaches the anterior lobe of the pituitary it stimulates the release thyroid-stimulating hormone (TSH) prolactin • Gonadotropin-releasing hormone (GnRH) Its secretion at the onset of puberty triggers sexual development and from then on it is essential for normal sexual physiology of both males and females. • Growth hormone-releasing hormone (GHRH)GHRH stimulates cells in the anterior lobe of the pituitary to secrete growth hormone (GH). • Corticotropin-releasing hormone (CRH) As its name indicates, its acts on cells in the anterior lobe of the pituitary to release adrenocorticotropic hormone (ACTH) • **Somatostatin**Somatostatin acts on the anterior lobe of the pituitary • **Dopamine**Dopamine is a derivative of the amino acid tyrosine. Its principal function in the hypothalamus is to inhibit the release of prolactin (PRL) from the anterior lobe of the pituitary