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Related Concept Videos

What is Homeostasis?01:16

What is Homeostasis?

52.3K
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).
52.3K
Homeostatic Imbalance01:10

Homeostatic Imbalance

32.2K
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,...
32.2K
Positive and Negative Feedback Loops01:18

Positive and Negative Feedback Loops

24.7K
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:
24.7K
Homeostatic Imbalances in Body Temperature01:19

Homeostatic Imbalances in Body Temperature

4.3K
Hyperthermia occurs when the body's temperature becomes unusually high, often due to heat exposure, intense physical activity, or certain illnesses. This condition can create a dangerous cycle where elevated body temperature increases the metabolic rate, generating more heat and potentially leading to organ failure and brain damage. A severe form of hyperthermia, called heat stroke, can raise body temperature to life-threatening levels. Fever, on the other hand, is a controlled form of...
4.3K
Non-equilibrium in the Cell01:16

Non-equilibrium in the Cell

5.3K
An important concept in studying metabolism and energy is that of chemical equilibrium. Most chemical reactions are reversible. They can proceed in both directions, releasing energy into their environment in one direction, and absorbing it from the environment in the other direction. The same is true for the chemical reactions involved in cell metabolism, such as the breaking down and building up of proteins into and from individual amino acids, respectively. Reactants within a closed system...
5.3K
pH Homeostasis01:31

pH Homeostasis

18.2K
Acid-base homeostasis is essential for maintaining normal physiological activities in humans. The pH of various body fluids is strictly regulated because it is critical for the optimal activity of enzymes involved in metabolic reactions. Enzymes are basically proteins, so, any significant change in pH can affect their structure and activity. In humans, pH is regulated using three primary mechanisms— chemical buffer systems, respiratory regulation, and renal regulation.
Respiratory...
18.2K

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Related Experiment Videos

Weight homeostasis.

G A Bray1

  • 1Pennington Biomedical Research Center, Louisiana State University, Baton Rouge 70808-4124.

Annual Review of Medicine
|January 1, 1991
PubMed
Summary
This summary is machine-generated.

This review presents a homeostatic model for nutrient intake and energy storage regulation. It examines clinical conditions like obesity and anorexia nervosa, suggesting potential underlying mechanisms.

Related Experiment Videos

Area of Science:

  • Physiology
  • Metabolism
  • Endocrinology

Background:

  • Nutrient intake and energy storage are tightly regulated processes.
  • Dysregulation of these processes contributes to various clinical conditions.
  • Understanding the homeostatic mechanisms is crucial for addressing metabolic disorders.

Purpose of the Study:

  • To describe a homeostatic model for nutrient intake regulation.
  • To explain the control of partitioning between fat and protein storage.
  • To examine clinical abnormalities of energy storage using this model.

Main Methods:

  • Literature review of homeostatic models.
  • Analysis of nutrient intake and energy partitioning mechanisms.
  • Examination of clinical conditions through the lens of the proposed model.

Main Results:

  • A homeostatic model for nutrient intake and energy storage is presented.
  • The model provides a framework for understanding fat and protein partitioning.
  • Clinical abnormalities such as obesity, anorexia nervosa, and cancer cachexia are discussed.

Conclusions:

  • The homeostatic model offers insights into energy storage regulation.
  • Potential mechanisms underlying clinical abnormalities are suggested.
  • This model can guide future research in metabolic and nutritional disorders.