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Hormonal Regulation

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.

Hormonal Regulation

Hormonal Regulation

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.

Hormonal Control of the Ovarian Cycle

Hormonal Control of the Ovarian Cycle

The ovarian cycle is meticulously regulated by the hypothalamic-pituitary-gonadal axis. This cycle orchestrates the release of a mature oocyte, essential for reproduction.
Before puberty, the hypothalamus releases GnRH in a low frequency, low amplitude pulsatile manner. This along with the immature hypothalamic-pituitary-gonadal axis activity, results in low estrogen levels and the absence of a fully functional ovarian cycle. At puberty, GnRH secretion increases in both frequency and...

Testosterone: Functions and Regulation

Testosterone: Functions and Regulation

The intricate hormonal interplay essential for male reproductive health begins with the release of gonadotropin-releasing hormone (GnRH) by the hypothalamus. This hormone prompts the pituitary gland to secrete follicle-stimulating hormone (FSH) and luteinizing hormone (LH). LH targets the Leydig cells in the testes, stimulating them to produce and release testosterone. In concert with testosterone, FSH acts on the Sertoli cells within the seminiferous tubules to facilitate the release of...

Target Cell Response to Hormones

Target Cell Response to Hormones

Hormones intricately bind to receptors on the surface or within target cells, initiating a cascade of cellular responses.
Notably, the cellular response can be regulated by altering the number of receptors expressed in the cell. For example, prolonged exposure to elevated hormone levels results in a gradual decline or down-regulation in the number of receptors for that specific hormone on the cell surface. Conversely, in response to low hormone levels, cells may use up-regulation, producing an...

Types of Hormones

Types of Hormones

Hormones can be classified into three main types based on their chemical structures: steroids, peptides, and amines. Their actions are mediated by the specific receptors they bind to on target cells.

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Related Experiment Video

Updated: May 9, 2026

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Published on: January 10, 2025

Hormone therapy: A to Z.

Catha Fischer¹, Amanda N Kallen, Lubna Pal

¹From the Department of Obstetrics, Gynecology, and Reproductive Sciences, Yale University School of Medicine.

Menopause (New York, N.Y.)

|August 8, 2013

Summary

Menopause symptom relief is crucial for women

Area of Science:

Obstetrics and Gynecology
Menopause Management
Hormone Therapy

Background:

Menopause significantly impacts women's quality of life.
Common symptoms include hot flashes and vaginal dryness.
Patient reluctance towards hormone therapy is a significant barrier.

Observation:

A 65-year-old postmenopausal woman presents with severe hot flashes and vaginal dryness.
She experiences painful intercourse due to vaginal dryness.
She expresses fear and reluctance regarding hormone therapy due to safety concerns.

Findings:

The patient seeks effective relief for debilitating menopause symptoms.
Hormone therapy is a potential treatment option.
Patient education is vital to address safety concerns and improve adherence.

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An Ex vivo Model to Study Hormone Action in the Human Breast

An Ex vivo Model to Study Hormone Action in the Human Breast

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An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

Published on: August 13, 2019

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Last Updated: May 9, 2026

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Establishment of Rat Models Mimicking Gender-affirming Hormone Therapies

Published on: January 10, 2025

An Ex vivo Model to Study Hormone Action in the Human Breast

An Ex vivo Model to Study Hormone Action in the Human Breast

Published on: January 8, 2015

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause

Published on: August 13, 2019

Implications:

Addressing patient concerns about hormone therapy is essential for effective menopause management.
Improving quality of life for menopausal women requires comprehensive symptom management.
Further research into safe and effective menopause symptom treatments is warranted.