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Related Concept Videos

Regulation of Hormone Secretion01:19

Regulation of Hormone Secretion

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Regulation of hormone secretion is a finely tuned orchestration driven by various types of stimuli, encompassing neural, humoral, and hormonal signals. Environmental cues instigate neural stimuli, where action potentials traverse nerve fibers to reach their designated targets. An illustrative scenario is the body's response to stress, wherein the sympathetic nervous system releases epinephrine from the adrenal glands, inducing the well-known 'fight or flight' reaction.
Humoral...
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Hormonal Regulation01:40

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Hormones regulate a significant portion of digestion through activation of the neuroendocrine system. The neuroendocrine system of digestion contains many different hormones all with multiple functions that are both, directly and indirectly, involved in digestion.
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Overview of Secretory Vesicles01:33

Overview of Secretory Vesicles

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Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
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Insulin Secretory Vesicles01:05

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Insulin secretory vesicles release insulin to stimulate blood glucose uptake and regulate carbohydrate metabolism. When the blood glucose levels increase, glucose enters the pancreatic β-islet cells through glucose transporters. Once inside, glucose is metabolized through glycolysis, the citric acid cycle, and the electron transport chain, producing ATP. This increase in ATP concentration closes ATP-sensitive potassium channels, leading to depolarization of the membrane and the opening of...
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Glucose Homeostasis: Pancreatic Islets and Insulin Secretion01:27

Glucose Homeostasis: Pancreatic Islets and Insulin Secretion

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The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
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Feedback Inhibition00:46

Feedback Inhibition

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Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that speed the reactions. Without enzymes, it would take far too long for most reactions to occur to be useful to the cell!
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Related Experiment Video

Updated: Jan 9, 2026

Regulation of Hormone Secretion
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Mycosis Fungoides.

Leslie Ojeaburu1, Tyler Larsen1,2

  • 1Medicine University of California, Los Angeles.

Journal of Brown Hospital Medicine
|March 3, 2025
PubMed
Summary

Mycosis fungoides, a type of cutaneous T-cell lymphoma, presents diagnostic challenges due to varied skin symptoms. This case highlights managing widespread disease with phototherapy and topical treatments.

Area of Science:

  • Dermatology
  • Hematology
  • Oncology

Background:

  • Mycosis fungoides is a rare cutaneous T-cell lymphoma (CTCL).
  • Early diagnosis is difficult due to variable skin presentations and atypical biopsy findings.
  • CTCL primarily affects the skin.

Observation:

  • An elderly patient presented with generalized, chronic pruritus.
  • The patient exhibited widespread cutaneous T-cell lymphoma.
  • The presentation mimicked other dermatologic conditions, complicating initial diagnosis.

Findings:

  • The case highlights the diagnostic challenges of mycosis fungoides.
  • Despite extensive skin involvement, the patient's condition is being managed.
  • Treatment involves a combination of phototherapy and topical antipruritic medications.
Keywords:
Cutaneous T cell LymphomaDermatologyMycosis fungoides

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Last Updated: Jan 9, 2026

Regulation of Hormone Secretion
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Hormonal Regulation of Digestion
01:40

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Overview of Secretory Vesicles
01:33

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Implications:

  • This case underscores the importance of considering CTCL in patients with persistent, unexplained skin conditions.
  • Effective management strategies can be employed even in advanced stages of mycosis fungoides.
  • Further research into early diagnostic markers for CTCL is warranted.