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Related Concept Videos

Homeostatic Imbalance01:10

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,...
Aging01:26

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...
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...
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:
Pathophysiology of Heart Failure01:17

Pathophysiology of Heart Failure

Heart failure (HF) is a progressive syndrome involving ventricles that leads to inadequate cardiac output. It can be classified based on location and output or ejection fraction. Ejection fraction (EF) is an essential measurement in the diagnosis and surveillance of HF. Reduced EF corresponds to systolic heart failure (HFrEF). However, HF with preserved ejection fraction (HFpEF) is becoming increasingly prevalent. Also known as diastolic HF, this form of HF is related to aging. The...
The Effect of Aging on Tissues01:19

The Effect of Aging on Tissues

Several body functions deteriorate with age. The external signs of aging are easily identifiable. For example, the skin becomes dry, less elastic, and thins out, forming wrinkles. The skin of the face begins to appear looser due to a decrease in the levels of elastic and collagen fibers in the connective tissue. Additionally, melanin production in the hair follicle decreases with age, resulting in gray hair. Moreover, the senses of sight and hearing decline, so glasses and hearing aids may...

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Related Experiment Video

Updated: Jun 12, 2026

Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
09:18

Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans

Published on: September 7, 2021

Frailty and the homeostatic network.

Stefania Bandinelli1, Anna Maria Corsi, Yuri Milaneschi

  • 1Geriatric Unit, Azienda Sanitaria di Firenze. bandinelli@asf.toscana.it

Acta Bio-Medica : Atenei Parmensis
|June 4, 2010
PubMed
Summary

Frailty in older adults accelerates decline and disrupts homeostasis, increasing health risks. Research explores biological markers beyond mobility to understand this complex aging syndrome.

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Last Updated: Jun 12, 2026

Quantifying Tissue-Specific Proteostatic Decline in Caenorhabditis elegans
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Published on: September 7, 2021

Frailty Assessment in an Aging Mouse Model
06:58

Frailty Assessment in an Aging Mouse Model

Published on: September 23, 2025

Using Caenorhabditis elegans as a Model System to Study Protein Homeostasis in a Multicellular Organism
12:38

Using Caenorhabditis elegans as a Model System to Study Protein Homeostasis in a Multicellular Organism

Published on: December 18, 2013

Area of Science:

  • Gerontology and Aging Research
  • Physiology and Homeostasis
  • Biomarker Discovery

Background:

  • Aging exhibits significant individual variability in health and function.
  • Frailty in older adults involves accelerated decline in functional reserve and failing compensatory mechanisms.
  • Current frailty identification relies on mobility and motor performance, but biological markers are emerging.

Purpose of the Study:

  • To explore the concept of frailty as an age-related physiological and pathological alteration.
  • To investigate emerging candidate biological markers for frailty syndrome.
  • To examine theories on aging, performance decline, and homeostatic dysregulation.

Main Methods:

  • Literature review of frailty syndrome conceptualization.
  • Analysis of theories on aging and loss of performance ability.
  • Exploration of homeostatic network dysregulation with age.

Main Results:

  • Frailty is characterized by a constellation of signs and symptoms resulting from age-related physiological and pathological changes.
  • Emerging research suggests biological markers may offer more specific identification of frailty.
  • A prominent hypothesis links frailty to progressive age-related dysregulation of the homeostatic network.

Conclusions:

  • Frailty represents a significant challenge in aging populations, impacting health outcomes.
  • Understanding the biological underpinnings of frailty is crucial for effective interventions.
  • The homeostatic network's efficiency is a key area for future research in aging and frailty.