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Related Concept Videos

Feedback Loops01:01

Feedback Loops

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In most cases, excessive hormone production is prevented by negative feedback—a loop that starts with a stimulus inducing the release of a particular substance, like a hormone, to maintain a certain level before triggering a signal that results in a decrease in further release of the hormone.
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Regulation of Hormone Secretion01:19

Regulation of Hormone Secretion

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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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Hormones of the Pituitary Gland01:27

Hormones of the Pituitary Gland

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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.
The most abundantly secreted hormone from the anterior lobe is the growth hormone, which controls overall growth by...
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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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Hormones and Bone Tissue01:17

Hormones and Bone Tissue

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The endocrine system produces and secretes hormones, which interact with the skeletal system. These hormones control bone growth, maintain bone once it is formed, and remodel it.
Hormones That Influence Osteoblasts and/or Maintain the Matrix
Several hormones are necessary for controlling bone growth and maintaining the bone matrix. The pituitary gland secretes growth hormone (GH), which, as its name implies, controls bone growth. This happens in several ways: first, it triggers chondrocyte...
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Target Cell Response to Hormones01:22

Target Cell Response to Hormones

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Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...
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Reproductive experience promotes permanent body growth independently of growth hormone.

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Ghrelin-induced food intake in male mice requires peripheral extrahepatic GHR signaling.

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Low Liver-Derived IGF-1 Drives the Alterations in Growth Hormone Secretion in Food-Restricted Male Mice.

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Updated: Sep 9, 2025

Hypothalamic Kisspeptin Neurons as a Target for Whole-Cell Patch-Clamp Recordings
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Hypothalamic Kisspeptin Neurons as a Target for Whole-Cell Patch-Clamp Recordings

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Negative Feedback Loops and Hormonal Factors that Regulate GH Secretion.

Ligia M M de Sousa1, Vanielle A N Vicente1, Jose Donato1

  • 1Department of Physiology and Biophysics, Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, Sao Paulo, SP 05508-000, Brazil.

Endocrinology
|September 5, 2025
PubMed
Summary

Growth hormone (GH) secretion is tightly controlled by complex feedback loops involving the hypothalamus and pituitary gland. Recent research highlights new hormonal and neuronal factors influencing this pulsatile release, crucial for growth and metabolism.

Keywords:
GHGHRHIGF-1hypothalamusneuroendocrinologysomatostatin

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Area of Science:

  • Neuroendocrinology
  • Physiology
  • Molecular Biology

Background:

  • Growth hormone (GH) is essential for body growth and numerous physiological functions.
  • GH is secreted by the anterior pituitary in a pulsatile manner, regulated by hypothalamic factors.
  • Negative feedback loops involving GH and insulin-like growth factor 1 (IGF-1) modulate secretion.

Purpose of the Study:

  • To review recent findings on the mechanisms regulating pulsatile GH secretion.
  • To discuss the implications of novel insights into GH neuroendocrine control.
  • To summarize the roles of hormonal and neuronal factors in GH regulation.

Main Methods:

  • Literature review of recent studies on GH secretion.
  • Analysis of regulatory mechanisms at pituitary and hypothalamic levels.
  • Examination of hormonal and neuronal circuit involvement.

Main Results:

  • GH secretion is influenced by negative feedback loops and specific hormonal factors.
  • Neuronal circuits play a significant role in regulating pulsatile GH release.
  • GH secretion is elevated during specific physiological states like pregnancy and hypoglycemia.

Conclusions:

  • The neuroendocrine control of GH secretion is complex and involves multiple regulatory layers.
  • Novel findings enhance our understanding of GH's role in growth and metabolism.
  • Further research into these mechanisms could have clinical implications for growth disorders.