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Related Concept Videos

Introduction to Stress and Lifestyle01:27

Introduction to Stress and Lifestyle

Stress is a multifaceted response to events perceived as challenging or threatening, highlighting physical, emotional, cognitive, and behavioral reactions. Physically, stress can lead to fatigue, sleep disruptions, and various health issues such as frequent colds, chest pains, and nausea. Emotionally, it can manifest as anxiety, depression, irritability, and anger triggered by both minor and major life events. Cognitively, it may result in difficulty in concentration, memory, and...
Regulation of Metabolism01:19

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Cellular needs and conditions vary from cell to cell and change within individual cells over time. For example, the required enzymes and energetic demands of stomach cells are different from those of fat storage cells, skin cells, blood cells, and nerve cells. Furthermore, a digestive cell works much harder to process and break down nutrients during the time that closely follows a meal compared with many hours after a meal. As these cellular demands and conditions vary, so do the amounts and...
Physiological Foundation of Stress01:24

Physiological Foundation of Stress

Stress triggers a coordinated physiological response involving the sympathetic nervous system (SNS) and the hypothalamic-pituitary-adrenal (HPA) axis. This dual activation ensures that the body is prepared for both immediate and prolonged stress management. The process begins with the perception of a stressor. This initial phase activates the SNS, leading to the rapid release of adrenaline (epinephrine) from the adrenal glands.
Role of the Sympathetic Nervous System
Adrenaline triggers the...
Introduction to Metabolism01:30

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Metabolism encompasses all biochemical reactions in a living organism, facilitating both the breakdown and synthesis of biomolecules. These metabolic processes are categorized into catabolic and anabolic pathways, which operate in a coordinated manner to ensure energy balance and cellular function.Catabolic Pathways and Energy ReleaseCatabolic pathways involve the breakdown of complex macromolecules such as carbohydrates, lipids, and proteins into smaller structures like monosaccharides, fatty...
Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

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.
Psychological Responses to Stress01:20

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Psychological responses to stress encompass the various cognitive and emotional reactions individuals experience when faced with challenging or threatening situations, such as a job loss. Prolonged exposure to stressors can disturb emotional balance, increasing negative emotions (e.g., anxiety and sadness) and diminishing positive emotions (e.g., joy and satisfaction). These persistent emotional shifts are associated with an increased risk of both physical illness and mental health issues, such...

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Related Experiment Video

Updated: Jul 6, 2026

Restraint to Induce Stress in Mice and Rats
03:48

Restraint to Induce Stress in Mice and Rats

Published on: December 6, 2024

Stress and metabolism.

G Seematter1, C Binnert, L Tappy

  • 1Division of Anesthesiology, Lausanne University Hospital, 1011 Lausanne, Switzerland.

Metabolic Syndrome and Related Disorders
|March 29, 2008
PubMed
Summary
This summary is machine-generated.

Mental stress impacts obese individuals differently, potentially worsening insulin resistance and central obesity. This highlights stress management

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Area of Science:

  • Endocrinology
  • Cardiovascular Physiology
  • Metabolic Health

Background:

  • Metabolic syndrome, characterized by obesity, lipid disorders, type 2 diabetes, and hypertension, is prevalent in affluent populations.
  • Insulin resistance is recognized as a key factor in the development of metabolic syndrome.
  • Stress responses involve the sympathoadrenal system, releasing hormones like cortisol and epinephrine, which can influence insulin sensitivity and fat distribution.

Purpose of the Study:

  • To investigate the differential physiological responses to mental stress in obese versus lean individuals.
  • To explore the role of stress-induced hormonal changes in the pathogenesis of metabolic syndrome components.
  • To understand how endothelial dysfunction in obesity affects cardiovascular and metabolic responses to stress.

Main Methods:

  • Comparison of physiological responses (blood pressure, vascular resistance, glucose disposal) to mental stress in obese and lean subjects.
  • Assessment of hormonal responses (catecholamines, cortisol) during stress.
  • Evaluation of endothelial function in relation to stress responses.

Main Results:

  • Obese individuals exhibit impaired systemic vascular resistance reduction during mental stress due to endothelial dysfunction.
  • Mental stress leads to heightened blood pressure responses and fails to stimulate glucose disposal in obese subjects.
  • Stress-induced hormonal changes, including elevated cortisol and epinephrine, may contribute to central obesity and insulin resistance over time.

Conclusions:

  • Mental stress exacerbates cardiovascular and metabolic dysregulation in obese individuals, differing significantly from responses in lean individuals.
  • Endothelial dysfunction in obesity plays a critical role in the adverse physiological responses to stress.
  • Chronic stress may be a significant contributor to the development and progression of metabolic syndrome and its associated vascular complications.