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Related Concept Videos

Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

Animal organs and organ systems constantly adjust to internal and external changes through a process called homeostasis ("steady state"). Examples of these changes include regulation of the level of glucose or calcium in the blood or internal responses to external temperatures. Homeostasis requires  maintaining an internal dynamic equilibrium:
What is Homeostasis?01:16

What is Homeostasis?

Maintaining homeostasis requires that the body continuously maintain its internal conditions. Each physiological condition has a particular set point, from body temperature to blood pressure to levels of certain nutrients. A set point is the physiological value around which the normal range fluctuates. A normal range is a restricted set of values that is optimally healthful and stable. For example, the set point for normal human body temperature is approximately 37°C (98.6°F). Physiological...
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Homeostatic Imbalance

Homeostasis is the maintenance of a stable internal environment within the body, which is crucial for the proper functioning of cells, tissues, organs, and organ systems. The body has various control mechanisms that work together to regulate various physiological parameters such as temperature, blood pressure, pH balance, and fluid balance, to name a few. These control mechanisms are based on feedback loops that can be either positive or negative.
However, sometimes these feedback loops fail,...
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Regulation of Hormone Secretion

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.
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Autonomic Nervous System01:22

Autonomic Nervous System

The autonomic nervous system (ANS) is a critical component of the peripheral nervous system, primarily responsible for regulating involuntary bodily functions and maintaining homeostasis. It functions in tandem with the central nervous system (CNS) to seamlessly coordinate various physiological processes without the need for conscious control.
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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.
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Updated: Jun 13, 2026

Isolation of Targeted Hypothalamic Neurons for Studies of Hormonal, Metabolic, and Electrical Regulation
09:29

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Coordinating different homeostatic processes.

Eve Marder1, Lamont S Tang

  • 1Volen Center and Biology Department, Brandeis University, Waltham, MA 02454, USA. marder@brandeis.edu

Neuron
|May 4, 2010
PubMed
Summary
This summary is machine-generated.

Researchers discovered a rapid presynaptic homeostatic regulation mechanism in fruit flies. Potassium channel genes, shal and shaker, are key to this process, revealing a hierarchy in how cells maintain balance.

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Area of Science:

  • Neurobiology
  • Synaptic Plasticity
  • Homeostatic Regulation

Background:

  • Presynaptic homeostatic regulation is crucial for maintaining synaptic transmission stability.
  • Understanding the molecular mechanisms underlying rapid homeostatic adjustments is an ongoing challenge in neuroscience.

Discussion:

  • Bergquist and colleagues investigate rapid presynaptic homeostatic regulation at the Drosophila neuromuscular junction.
  • The study focuses on the roles of specific potassium channel genes in this regulatory process.

Key Insights:

  • The potassium channel genes shal and shaker are reciprocally regulated within the central nervous system.
  • This reciprocal regulation suggests a hierarchical organization of homeostatic processes.

Outlook:

  • Further research can elucidate the precise molecular pathways involved in this hierarchical organization.
  • Findings may offer insights into neurological disorders characterized by synaptic dysfunction.