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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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Gastric Emptying01:16

Gastric Emptying

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Gastric emptying occurs when the stomach gradually releases chyme into the duodenum. When the stomach is distended, it triggers the release of gastrin, a hormone that promotes gastric acid secretion to aid in digestion. Additionally, stomach distension contributes to peristaltic waves that propel gastric contents toward the pyloric region. The gastroenteric reflex, on the other hand, primarily stimulates peristalsis in the intestines, facilitating the movement of contents further along the...
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Protein Digestion01:02

Protein Digestion

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Protein digestion begins in the stomach, where the highly acidic environment can easily disrupt protein structure by exposing the peptide bonds of polypeptide chains. After polypeptide chains are broken into individual amino acids by a series of digestive enzymes, the amino acids are transported to the liver via the bloodstream to produce energy.
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Unusual Results01:16

Unusual Results

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Unusual results are those that have a very low chance of occurring. Unusual results can be identified using probabilities and the range rule of thumb. In problems involving probability, unusual results can be observed in 2 instances – an unusually high number of successes or an unusually low number of successes.
According to the range rule of thumb, any value above or below two standard deviations, 2σ  from the mean, μ  is considered unusual.
Maximum unusual value =...
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Primary Motives: Hunger and Thirst01:25

Primary Motives: Hunger and Thirst

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Hunger and thirst are fundamental physiological drives crucial for maintaining homeostasis and ensuring the survival of both humans and animals. These drives are regulated through complex interactions between the brain, hormones, and sensory receptors.
Hunger arises when the brain detects changes in the body's nutrient levels, including glucose, lipids, amino acids, and hormones such as ghrelin and leptin. The hypothalamus plays a central role in hunger regulation. The lateral hypothalamus...
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Metabolic States of the Body: Fasting and Starvation01:24

Metabolic States of the Body: Fasting and Starvation

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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

The Attentional Set Shifting Task: A Measure of Cognitive Flexibility in Mice
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Mystery meals no more.

Bill Santamour

    Hospitals & Health Networks
    |June 14, 2014
    PubMed
    Summary

    Malnutrition affects nearly one-third of U.S. hospital patients. Addressing nutrition both in and out of the hospital is crucial for effective patient care and recovery.

    Area of Science:

    • Clinical Nutrition
    • Hospital Patient Care
    • Malnutrition Research

    Background:

    • Malnutrition is prevalent in hospitalized patients, affecting nearly one-third of admissions in the U.S.
    • Nutritional status significantly impacts patient outcomes and recovery.
    • Effective nutritional management is a key priority in healthcare settings.

    Purpose of the Study:

    • To highlight the significant prevalence of malnutrition in U.S. hospitals.
    • To emphasize the critical role of nutrition in patient care pathways.
    • To underscore the importance of addressing nutritional needs both during hospitalization and post-discharge.

    Main Methods:

    • Review of patient admission data to determine malnutrition prevalence.
    • Analysis of current nutritional support protocols in hospitals.

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  • Examination of factors influencing nutritional status in clinical settings.

    • Main Results:

    • Prevalence data indicates that approximately 33% of U.S. hospital admissions are associated with malnutrition.
    • Nutritional interventions are integral to comprehensive patient management strategies.
    • Continuum of care for nutrition extends beyond hospital discharge.

    Conclusions:

    • Malnutrition represents a substantial challenge in U.S. hospitals, impacting a significant patient cohort.
    • Prioritizing nutrition is essential for improving patient outcomes and reducing healthcare burdens.
    • Integrated nutritional care, both inpatient and outpatient, is vital for optimal patient recovery.