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Related Concept Videos

Dietary Connections01:23

Dietary Connections

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In biological systems, most metabolic pathways are interconnected. The cellular respiration processes that convert glucose to ATP—such as glycolysis, pyruvate oxidation, and the citric acid cycle—tie into those that break down other organic compounds. As a result, various foods—from apples to cheese to guacamole—end up as ATP. In addition to carbohydrates, food also contains proteins and lipids—such as cholesterol and fats. All of these organic compounds are used...
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In general, a schema is a mental construct consisting of a cluster or collection of related concepts (Bartlett, 1932). There are many different types of schemata, and they all have one thing in common: schemata are a method of organizing information that allows the brain to work more efficiently. When a schema is activated, the brain makes immediate assumptions about the person or object being observed.
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Regulation of Food Intake01:30

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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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Nature and Nurture01:10

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Many human characteristics, like height, are shaped by both nature—in other words, by our genes—and by nurture, or our environment. For example, chronic stress during childhood inhibits the production of growth hormones and consequently reduces bone growth and height. Scientists estimate that 70-90% of variation in height is due to genetic differences among individuals, and 10-30% of variation in height is due to differences in the environments that individuals experience,...
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Absorption of Nutrients01:19

Absorption of Nutrients

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Absorption refers to taking dietary nutrients from the intestinal lumen for transportation throughout the body. After digestion in the small intestine, carbohydrates, proteins, and fats are broken down into simpler forms. These essential macronutrients and other vital substances, such as vitamins, minerals, and water, are then prepared for absorption into the bloodstream.
Enterocytes, which are specialized polar epithelial cells, line the mucosa of the small intestinal walls. These cells...
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Metabolic States of the Body: Fasting and Starvation01:24

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During the initial hours of fasting, the body uses up its glycogen stores as an energy source. Once these glycogen reserves are depleted, the body begins breaking down stored triglycerides and structural proteins. During this stage, glycerol becomes a key substrate for gluconeogenesis, while free fatty acids undergo beta-oxidation to provide energy for tissues, such as skeletal muscle. In the fasting state, the body spares protein breakdown as much as possible to conserve muscle and structural...
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Related Experiment Video

Updated: Apr 28, 2026

Fat Preference: A Novel Model of Eating Behavior in Rats
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Fat Preference: A Novel Model of Eating Behavior in Rats

Published on: June 27, 2014

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You are what you eat.

Zenobia Lewis1, Chloe Heys1, Mark Prescott1

  • 1Institute of Integrative Biology; School of Life Sciences; University of Liverpool; Liverpool, UK.

Gut Microbes
|June 13, 2014
PubMed
Summary

Gut bacteria influence Drosophila behavior, affecting mating choices based on familiarity or relatedness. This suggests gut microbes play a role in kin recognition through scent modification.

Keywords:
Drosophilabehaviourcuticular hydrocarbonsgut bacteriagut microbiotakin recognition

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Area of Science:

  • Microbiology
  • Behavioral Ecology
  • Genetics

Background:

  • Gut bacteria are increasingly recognized as critical for host physiology and development.
  • Emerging research implicates gut microbiota in modulating host behavior.

Purpose of the Study:

  • To investigate the role of gut bacteria in influencing behavioral processes in Drosophila.
  • To determine if gut bacteria variation affects kin recognition and mating behavior.

Main Methods:

  • Studied two species of Drosophila.
  • Observed behavioral changes in relation to gut bacteria variation.
  • Assessed partner investment in copulation based on familiarity and relatedness.

Main Results:

  • Gut bacteria variation significantly altered Drosophila behavior.
  • Behavioral changes included altered partner investment in copulation.
  • Findings suggest gut bacteria influence kin recognition in Drosophila.

Conclusions:

  • Gut bacteria play a role in kin recognition in Drosophila species.
  • Gut microbes may influence mate choice by altering scent profiles.
  • This highlights a novel interaction between gut microbiota and social behavior.