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Hormones of the Adrenal Glands01:31

Hormones of the Adrenal Glands

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Adrenal hormones play a pivotal role in maintaining the body's electrolyte balance and orchestrating responses to stress, showcasing the intricate functions of the adrenal cortex and medulla.
The adrenal cortex, a powerhouse of hormone synthesis, generates over two dozen corticosteroid hormones. The zona glomerulosa produces mineralocorticoids, exemplified by aldosterone, influencing the electrolyte composition of body fluids. The synthesis of glucocorticoids such as cortisol and...
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Adrenal gland disorders manifest when the production of adrenal hormones deviates from the norm, resulting in either excessive or insufficient concentrations.
Adrenal insufficiency, characterized by insufficient cortisol and aldosterone production, leads to conditions like Addison's disease. This disorder, affecting the adrenal cortex, exhibits symptoms such as skin bronzing, dehydration, low blood pressure, fatigue, and weight loss. Congenital adrenal hyperplasia, a genetic ailment causing...
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Antiasthma Drugs: Inhaled Corticosteroids and Glucocorticoids01:25

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Inhaled corticosteroids (ICS) are anti-inflammatory drugs used primarily in treating persistent asthma and providing long-term maintenance. They target the bronchial mucosa, the lining of the airways, to control inflammation, a critical factor in asthma progression and exacerbation.
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Drug Excretion: Pulmonary and Glandular Routes01:22

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Gaseous substances like general anesthetics are absorbed and excreted through the lungs via simple diffusion. This process depends on factors such as pulmonary blood flow, respiration rate, and the substance's solubility. Gaseous anesthetics like nitrous oxide with low blood solubility are excreted rapidly, while compounds like alcohol, with high blood and tissue solubility, are excreted slowly.
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Cushing Syndrome I: Introduction01:26

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Cushing syndrome refers to the collection of clinical manifestations that arise when tissues are exposed to excessive amounts of cortisol or cortisol-like medications over an extended period. Cortisol, a glucocorticoid produced by the adrenal cortex, regulates metabolism, immune responses, and the body’s adaptation to stress. When its concentration remains chronically elevated, these physiological pathways become dysregulated, resulting in the characteristic features of the...
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Cushing Syndrome II: Pathophysiology01:19

Cushing Syndrome II: Pathophysiology

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Cortisol production is normally governed by the hypothalamic–pituitary–adrenal (HPA) axis, which maintains hormonal balance through tightly regulated feedback mechanisms. Disruption of this regulatory system is central to the development of Cushing syndrome, whether the excess cortisol originates from external medications or internal pathology. Persistent cortisol elevation alters metabolism, immune function, and endocrine signaling, producing the characteristic clinical features...
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Related Experiment Video

Updated: May 5, 2026

Extraction and Analysis of Cortisol from Human and Monkey Hair
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Pulmonary disposition of cortisol

A C Braude, A S Rebuck

    Annals of Internal Medicine
    |July 1, 1982
    PubMed
    Summary

    High-dose corticosteroids reach lung alveolar structures. Cortisol levels in blood and bronchoalveolar lavage fluid correlate linearly, confirming drug penetration into the lung acinus for effective treatment.

    Area of Science:

    • Pulmonary Medicine
    • Pharmacokinetics
    • Respiratory Diseases

    Background:

    • High-dose corticosteroid therapy is common for lung diseases.
    • The precise distribution of corticosteroids within the lung, specifically the alveolar acinus, remains unclear.

    Purpose of the Study:

    • To determine if high-dose corticosteroids reach the alveolar acinus.
    • To quantify the relationship between serum and bronchoalveolar lavage fluid cortisol levels.

    Main Methods:

    • Measured cortisol and albumin concentrations in serum and bronchoalveolar lavage fluid.
    • Analyzed 12 patients with lung disease receiving corticosteroid therapy.
    • Correlated cortisol levels, adjusted for albumin concentration, between blood and lavage fluid.

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    Main Results:

    • A significant linear relationship was observed between serum and bronchoalveolar lavage fluid cortisol concentrations when normalized to albumin (r = 0.93, p < 0.001).
    • This indicates that increasing doses of intravenous hydrocortisone achieve concentrations in alveolar structures proportional to circulating blood levels.

    Conclusions:

    • High-dose corticosteroids, specifically hydrocortisone, effectively penetrate the alveolar structures of the lung.
    • The concentration of corticosteroids in the alveolar fluid is directly related to systemic levels, supporting their use in treating lung diseases.