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Related Concept Videos

Regulation of the Cardiovascular System01:27

Regulation of the Cardiovascular System

The regulation of the cardiovascular system allows the body to adapt to various demands and maintain homeostasis.
The regulation of the cardiovascular system involves the autonomic nervous system (ANS), baroreceptors, and chemoreceptors, ensuring that heart rate and blood pressure are appropriately modulated in response to varying physiological demands.
The ANS comprises two main divisions: the sympathetic and parasympathetic nervous systems. The sympathetic nervous system enhances...
Secondary Messengers in Hormone Action01:26

Secondary Messengers in Hormone Action

Water-soluble hormones cannot cross the plasma membrane, so they rely on protein receptors that span the membrane to trigger intracellular signaling pathways. These pathways then activate second messengers inside the cell, including cAMP or calcium ions.
Many hormones bind to transmembrane G protein-coupled receptors that connect to regulatory G proteins. These G proteins can then activate enzymes such as adenylyl cyclase or phospholipase C. Adenylyl cyclase converts ATP to cAMP, activating...
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Epinephrine and Norepinephrine
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Major Hormones and Their Functions01:27

Major Hormones and Their Functions

Hormones, the biochemical messengers produced by endocrine glands, are pivotal in regulating bodily functions and maintaining homeostasis. Each hormone's balance is crucial; imbalances can lead to significant physiological disruptions. Major hormones include oxytocin, cortisol, epinephrine, estrogen, testosterone, thyroxine, growth hormone, insulin, and glucagon.
Oxytocin, produced in the hypothalamus and released by the pituitary gland, plays a role in social bonding, childbirth, and lactation.
Target Cell Response to Hormones01:22

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...
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Chemical Signaling in the Endocrine System

A signaling cascade is a series of events that facilitates the transmission of information within or between cells, culminating in a targeted response in the recipient cell. As chemical messengers, hormones are pivotal in initiating and modulating these intricate signaling cascades based on their solubility.
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An In Vivo Estrogen Deficiency Mouse Model for Screening Exogenous Estrogen Treatments of Cardiovascular Dysfunction After Menopause
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Published on: August 13, 2019

Estrogen actions in the cardiovascular system.

M E Mendelsohn1

  • 1Molecular Cardiology Research Institute, Tufts Medical Center, Tufts University School of Medicine, Boston, USA.

Climacteric : the Journal of the International Menopause Society
|October 9, 2009
PubMed
Summary
This summary is machine-generated.

Estrogen receptor actions impact cardiovascular health. Hormone replacement therapy (HRT) effects on the cardiovascular system are reviewed, including insights from estrogen receptor knockout mouse models.

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Area of Science:

  • Cardiovascular Science
  • Endocrinology
  • Pharmacology

Background:

  • Estrogen receptors play a critical role in cardiovascular system regulation.
  • Hormone replacement therapy (HRT) has known cardiovascular implications.
  • Understanding estrogen's vascular mechanisms is crucial for cardiovascular health.

Purpose of the Study:

  • To review the current understanding of estrogen receptor actions in the cardiovascular system.
  • To summarize the cardiovascular effects of hormone replacement therapy (HRT).
  • To provide an update on advanced mouse models for studying estrogen action.

Main Methods:

  • Literature review of current research on estrogen receptor signaling in the cardiovascular system.
  • Analysis of clinical data on hormone replacement therapy and cardiovascular outcomes.
  • Examination of findings from estrogen receptor knockout mouse models.

Main Results:

  • Estrogen exerts complex effects on blood vessels.
  • Clinical data on HRT and cardiovascular effects present a nuanced picture.
  • Estrogen receptor knockout mice offer valuable insights into specific estrogen actions.

Conclusions:

  • Estrogen receptor signaling is integral to cardiovascular function.
  • The cardiovascular impact of HRT requires careful consideration.
  • Innovative mouse models are advancing the study of estrogen's cardiovascular roles.