Hormonal Stress Theory
Hormonal Stress Theory - Related Videos
11:01
Monitoring Plant Hormones During Stress Responses
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Cited by 11 •
2009
A simple method is provided that allows for the rapid extraction and analysis of multiple plant hormones from small tissue samples. The procedure uses vapor phase extraction as the solemn purification step. Samples are analyzed by GC/MS with chemical ionization that produces mainly (M+1)+ ions.
02:13
Types of Hormones
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2019
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. Steroid hormones are derived from cholesterol and are lipophilic in nature. This allows them to readily traverse the lipid-rich cell membrane to bind to their intracellular receptors in the cytoplasm or nucleus. Once bound, the cytoplasmic hormone-receptor complex translocates to the nucleus.
01:33
Hormonal Regulation
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2019
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.
01:56
Plant Hormones
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2020
Plant hormones—or phytohormones—are chemical molecules that modulate one or more physiological processes of a plant. In animals, hormones are often produced in specific glands and circulated via the circulatory system. However, plants lack hormone-producing glands. Instead, plant hormones are often produced in regions of active growth, like the tips of roots and shoots. Additionally, even very low concentrations of plant hormones can have a profound effect on growth and development processes.
06:41
Prospect Theory
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2023
Source: Laboratory of Jonathan Flombaum—Johns Hopkins University What’s the value of a dollar? Currencies store value to facilitate trade. Implied in any economic transaction is the value of a unit of currency. But what is the subjective value of a dollar? For a long time, economists assumed the answer to this question to be, specifically, that a dollar has a value determined by the market and that the subjective value of a dollar is always that, more or less. Beginning in the early 1970s,...
FAQs
The HPA axis and sympathetic nervous system represent coordinated but distinct components of the stress response. HPA activity follows a hormonal sequence that culminates in cortisol release, whereas sympathetic activation can produce rapid adrenaline release. This distinction helps researchers examine immediate arousal separately from the effects associated with repeated or prolonged endocrine activation.
The sequence links a stress signal to measurable endocrine activity and potential psychological outcomes. Hypothalamic corticotropin-releasing hormone stimulates pituitary adrenocorticotropic hormone secretion, which then prompts the adrenal cortex to release cortisol. Mapping these stages allows researchers to relate stress-related biological processes to changes in behavior, mood, cognition, and health.
Repeated or prolonged activation shifts attention from a single stress response to the possible consequences of sustained endocrine involvement. Researchers can examine whether ongoing stress-related activation corresponds with changes in anxiety, mood, cognition, behavior, or physical health. This perspective also supports investigation of stress-related disorders and the role of coping or regulation.
The framework considers stress responses arising from perceived stress as well as physiological stress. This broad scope allows psychological research to connect how stress is experienced or interpreted with endocrine activity and related outcomes. Researchers can therefore study links among stress signals, hormonal responses, behavior, mood, cognition, and health rather than treating stress as purely mental or purely biological.
Psychologists can use the framework to examine how stress-related endocrine responses correspond with anxiety, trauma, and stress-related disorders. A study may consider the initiating stress signal, the HPA-axis and sympathetic responses, and associated changes in mood, cognition, or behavior. This organization helps connect biological stress mechanisms with clinically relevant psychological patterns.
Researchers can investigate outcomes across several levels, including behavior, mood, cognition, and physical health. They may also examine whether repeated or prolonged activation is associated with stress-related disorders. Because the framework includes both endocrine responses and psychological processes, it supports research that connects biological stress activity with broader mental and physical effects.
Coping strategies and interventions are considered in relation to their potential to regulate stress responses. Researchers can examine whether these approaches correspond with changes in endocrine activation or with improvements in behavior, mood, cognition, or health. This makes the theory relevant not only for explaining stress responses, but also for evaluating ways to manage them.