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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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Target Cell Response to Hormones01:22

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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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An Overview of the Endocrine System01:10

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The endocrine system, a complex network of glands, orchestrates physiological balance within the body through the production and secretion of hormones. These hormones are chemical messengers in intercellular communication, acting as conduits between the secretory cells and distant target sites. They traverse the circulatory system by being released into the extracellular fluid, and their impact is specific to cells possessing receptors for a particular hormone.
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Gene-Environment Interactions01:20

Gene-Environment Interactions

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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Transcription01:10

Transcription

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Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
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Structures of the Endocrine System00:59

Structures of the Endocrine System

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The intricate framework of the endocrine system encompasses a diverse array of glands, with their target tissues and organs strategically distributed throughout the body. Central to this network are the endocrine glands, specialized structures that lack ducts and release hormones directly into the interstitial fluid. Notably, the hypothalamus, a vital neuroendocrine organ situated in the brain, governs neural functions and serves as a potent source of hormonal regulation. Near the hypothalamus...
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Endocrine responses to environmental variation.

Alexander G Little1, Frank Seebacher2

  • 1Department of Biology, Life Sciences Building, McMaster University, Hamilton, Ontario, Canada L8S 4K1.

Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
|February 4, 2024
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Summary
This summary is machine-generated.

Hormones help organisms adapt to environmental changes by adjusting their traits. Understanding endocrine flexibility is crucial for predicting how species will respond to human-driven environmental shifts and for effective conservation efforts.

Keywords:
artificial light-at-nightclimate changeendocrine disrupting compoundsendocrine flexibilityglucocorticoidreproductionthyroid

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Area of Science:

  • Endocrinology
  • Ecology
  • Environmental Science

Background:

  • Hormones are critical regulators of physiological functions, development, and responses to environmental cues.
  • Endocrine systems exhibit flexibility, altering hormone levels and receptor densities to adapt phenotypes.
  • This endocrine flexibility links environmental conditions to organismal function, impacting individuals and populations.

Purpose of the Study:

  • To explore the concept of endocrine flexibility in mediating organismal responses to environmental variation.
  • To highlight the importance of understanding evolved endocrine responses in the context of anthropogenic environmental change.
  • To emphasize the role of endocrine responses in ecology and conservation.

Main Methods:

  • Conceptual review of endocrine regulation and environmental interactions.
  • Discussion of hormone signaling, receptor dynamics, and phenotypic plasticity.
  • Integration of ecological and conservation perspectives on endocrine responses.

Main Results:

  • Hormone signaling allows for phenotypic adjustments to prevailing environmental conditions.
  • Endocrine flexibility is a key mechanism for adapting to environmental changes, including human impacts.
  • Hormones can link environmental signals to epigenetic processes, influencing transgenerational plasticity.

Conclusions:

  • Understanding endocrine responses to environmental variation is essential for predicting organismal and population-level outcomes.
  • Anthropogenic environmental changes necessitate urgent research into evolved endocrine adaptations.
  • Integrating endocrine insights into conservation strategies can enhance their effectiveness.