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Related Concept Videos

An Overview of the Endocrine System01:10

An Overview of the Endocrine System

The endocrine system, a complex network of glands, orchestrates physiological balance within the body through the production and secretion of hormones. These hormones are chemical messengers in intercellular communication, acting as conduits between the secretory cells and distant target sites. They traverse the circulatory system by being released into the extracellular fluid, and their impact is specific to cells possessing receptors for a particular hormone.
The endocrine system collaborates...
What is the Endocrine System?00:46

What is the Endocrine System?

The endocrine system sends hormones—chemical signals—through the bloodstream to target cells—the cells the hormones selectively affect. These signals are produced in endocrine cells, secreted into the extracellular fluid, and then diffuse into the blood. Eventually, they diffuse out of the blood and bind to target cells which have specialized receptors to recognize the hormones.
Target Cell Response to Hormones01:22

Target Cell Response to Hormones

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...
Structures of the Endocrine System00:59

Structures of the Endocrine System

The intricate framework of the endocrine system encompasses a diverse array of glands, with their target tissues and organs strategically distributed throughout the body. Central to this network are the endocrine glands, specialized structures that lack ducts and release hormones directly into the interstitial fluid. Notably, the hypothalamus, a vital neuroendocrine organ situated in the brain, governs neural functions and serves as a potent source of hormonal regulation. Near the hypothalamus...
Endocrine Signaling01:45

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.
Endocrine Signaling01:45

Endocrine Signaling

Endocrine cells produce hormones to communicate with remote target cells found in other organs. The hormone reaches these distant areas using the circulatory system. This exposes the whole organism to the hormone but only those cells expressing hormone receptors or target cells are affected. Thus, endocrine signaling induces slow responses from its target cells but these effects also last longer.

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Related Experiment Video

Updated: Jul 11, 2026

Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation
07:48

Intravenous Endotoxin Challenge in Healthy Humans: An Experimental Platform to Investigate and Modulate Systemic Inflammation

Published on: May 16, 2016

Infection, immunity, and hormones/endocrine interactions.

Romesh Khardori1, Alys Adamski, Nancy Khardori

  • 1Division of Endocrinology, Southern Illinois University School of Medicine, 701 North First Street, D-405B, Springfield, IL 62794-9636, USA. rkhardori@siumed.edu

Infectious Disease Clinics of North America
|September 11, 2007
PubMed
Summary

Infections, stress, and hormones interact to maintain immune function. Understanding these connections allows for therapies to improve immune response and manage metabolic issues, reducing illness and death.

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Area of Science:

  • Immunology
  • Endocrinology
  • Infectious Disease

Background:

  • Infections and stress trigger complex interactions involving immune responses and hormones.
  • Cytokines act as crucial signal mediators in these physiological processes.
  • Hormonal autocrine and paracrine influences are key to understanding signal transmission.

Purpose of the Study:

  • To explore the interconnectedness of infections, stress, immune responses, and hormones.
  • To understand the mechanisms of signal transmission and response evoked by these interactions.
  • To identify therapeutic strategies for modulating detrimental host-pathogen interactions.

Main Methods:

  • Review of existing literature on immunology, endocrinology, and infectious disease.
  • Analysis of the roles of cytokines and hormones in immune competence.
  • Examination of metabolic factors influencing host defense and outcomes.

Main Results:

  • The interplay between infections, stress, immune signals (cytokines), and hormones is vital for immune competence.
  • Hormonal influences and cytokine signaling explain the transmission of immune responses.
  • Therapeutic interventions targeting these pathways show potential for enhancing protective signals.
  • Correction of metabolic abnormalities like hyperglycemia and metabolic acidosis improves host outcomes.

Conclusions:

  • Understanding the neuroendocrine-immune axis is crucial for developing novel therapies.
  • Modulating immune and hormonal signals can mitigate detrimental effects of infections and stress.
  • Metabolic interventions are essential for reducing morbidity and mortality associated with infections.