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Related Concept Videos

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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Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla01:27

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The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
Collateral Ganglia
Sympathetic preganglionic axons reach the collateral ganglia along the route of splanchnic nerves. These nerves bypass the sympathetic trunk and communicate with sympathetic postganglionic neurons housed in the prevertebral ganglia. These ganglia supply the organs of the abdominopelvic cavity.
The greater splanchnic nerve, formed by the...
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Anatomy of the Adrenal Glands01:17

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The adrenal or supra-renal glands, situated above the kidneys and aligned with the twelfth rib, are paired pyramid-shaped structures crucial for the body's stress response. During stress, these glands secrete hormones vital for adaptive physiological reactions.
These glands possess a distinctive yellow tinge due to the stored cholesterol and fatty acids required for hormone synthesis. They are encased in a fibrous capsule and cushioned by fat.
The adrenal gland comprises two distinct...
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Brainstem: Control Centers of Medulla01:21

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The medulla oblongata is a crucial part of the brainstem responsible for controlling various autonomic and involuntary functions. It contains several nuclei, including the olivary, cuneate, gracile, and solitary nuclei.
Olivary Nucleus
The olivary nucleus, or inferior olivary nucleus, is located within the ventrolateral part of the medulla oblongata. It is primarily involved in motor coordination and motor learning. The olivary nucleus receives input from the spinal cord, cerebellum, and motor...
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Hypothalamic-Pituitary Axis01:37

Hypothalamic-Pituitary Axis

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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.
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Adrenal Gland Disorders01:27

Adrenal Gland Disorders

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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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Related Experiment Video

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Isolation, Fixation, and Immunofluorescence Imaging of Mouse Adrenal Glands
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Adrenal medulla development and medullary-cortical interactions.

Nicole Bechmann1, Ilona Berger2, Stefan R Bornstein3

  • 1Department of Internal Medicine III, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; Institute of Clinical Chemistry and Laboratory Medicine, University Hospital Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany; German Institute of Human Nutrition Potsdam-Rehbruecke, Department of Experimental Diabetology, Nuthetal, Germany; German Center for Diabetes Research (DZD), München-Neuherberg, Germany.

Molecular and Cellular Endocrinology
|April 2, 2021
PubMed
Summary

The mammalian adrenal gland has two parts: the medulla (producing catecholamines) and the cortex (producing steroids). Their interactions are vital for development, function, and disease.

Keywords:
AdrenalCortexDevelopmentInteractionsMedullaPathologiesStem cells

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Area of Science:

  • Endocrinology
  • Developmental Biology
  • Neuroscience

Background:

  • The mammalian adrenal gland comprises a catecholamine-producing medulla (neural crest-derived) and a steroid-producing cortex (mesoderm-derived).
  • Chromaffin cells, the main medulla components, originate from Schwann cell precursors.
  • Interactions between the cortex and medulla are crucial for adrenal gland development, function, and disease pathogenesis.

Purpose of the Study:

  • To review the developmental processes of the mammalian adrenal medulla.
  • To summarize current knowledge on cortical-medullary interactions during adrenal gland development.
  • To elucidate the role of these interactions in adrenal health and disease.

Main Methods:

  • Literature review and synthesis of existing research on adrenal gland development and function.
  • Analysis of studies focusing on cellular origins and differentiation within the adrenal gland.
  • Examination of research on inter-tissue communication and its implications in adrenal homeostasis and pathology.

Main Results:

  • The adrenal medulla develops from neural crest cells, differentiating into chromaffin cells.
  • Cortical-medullary interactions are essential for proper adrenal morphogenesis and differentiation.
  • These interactions maintain normal adrenal function in adults and are implicated in tumor development.

Conclusions:

  • The bidirectional communication between the adrenal cortex and medulla is fundamental throughout life.
  • Understanding these interactions provides insights into adrenal gland development, physiological regulation, and disease states.
  • Further research into cortical-medullary crosstalk can inform therapeutic strategies for adrenal disorders.