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Related Concept Videos

Major Hormones and Their Functions01:27

Major Hormones and Their Functions

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Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and...
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The Pituitary Gland01:17

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The pituitary is a small endocrine organ in the sphenoid bone under the hypothalamus. Primarily, the pituitary in adults has two distinct anatomical and functional regions— the anterior and posterior lobes. During human fetal development, a third pituitary gland region called the pars intermedia atrophies and disappears. However, some of its cells migrate and exist adjacent to the anterior pituitary in adults.
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The small, pea-sized pituitary gland is located at the base of the brain. It is crucial in regulating various bodily functions, from growth to reproduction. The gland is divided into the anterior lobe and the posterior lobe. The secretory cell clusters in the pars distalis of the anterior pituitary lobe are controlled by hypothalamic regulators and synthesize six primary hormones.
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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Regulation of Hormone Secretion01:19

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Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
Humoral...
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The Endocrine System01:29

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The endocrine system is an extensive network of glands – organs or tissues in the body that create chemicals that control many bodily functions, that secrete hormones, which are chemical messengers that play essential roles in regulating various bodily functions. These hormones are secreted into the bloodstream and travel throughout the body. They require specific receptors to convey signals to cells possessing these corresponding receptors. This complex signaling mechanism ensures that...
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Endoscopic Endonasal Trans-sphenoidal Approach: Minimally Invasive Surgery for Pituitary Adenomas
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Endocrinology Update: Hypopituitarism.

Joel J Heidelbaugh1

  • 1University of Michigan Medical School Ypsilanti Health Center, 200 Arnet Suite 200, Ypsilanti, MI 48198.

FP Essentials
|December 13, 2016
PubMed
Summary

Hypopituitarism, a deficiency in pituitary hormones, impacts quality of life and increases health risks. Diagnosis involves symptom investigation, while treatment focuses on hormone replacement and addressing the underlying cause.

Area of Science:

  • Endocrinology
  • Neuroendocrinology

Background:

  • Hypopituitarism involves deficiency of one or more pituitary hormones, affecting gland/hypothalamus function.
  • It is rare but commonly occurs post-traumatic brain injury and with pituitary adenomas.
  • This condition elevates risks of morbidity, mortality, and reduced quality of life.

Purpose of the Study:

  • To define hypopituitarism and outline its diagnostic and management strategies.
  • To emphasize the importance of thorough patient evaluation and lifelong monitoring.

Main Methods:

  • Diagnosis relies on investigating symptoms of target endocrine gland function relative to pituitary hormone deficiency.
  • Clinical assessment includes detailed history, physical examination, and visual field testing.
  • Management involves pharmacotherapy, surgery, and/or radiotherapy.

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Main Results:

  • Clinical manifestations correlate with the degree of specific hormone deficiency.
  • Hormone replacement is the primary therapy for anterior and posterior pituitary hormone deficiencies.
  • Prognosis is influenced by presentation, severity of impairment, and treatment response.

Conclusions:

  • Prompt diagnosis and management, including hormone replacement, are crucial for restoring endocrine function and quality of life.
  • Lifelong monitoring of hormone levels and symptoms is essential for patients with hypopituitarism.