Resistance Stage
Resistance Stage - Related Videos
01:22
Resistivity
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2023
When a voltage is applied to a conductor, an electrical field is generated, and charges in the conductor feel the force due to the electrical field. The current density that results depends on the electrical field and the properties of the material. In some materials, including metals at a given temperature, the current density is approximately proportional to the electrical field. In these cases, the current density can be modeled as: where σ is the electrical conductivity and is represented...
01:19
Resistance
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2023
When a current moves through any conductor, the conductor causes some level of difficulty for the current to flow. The measure of that difficulty is known as the resistance of the material and is represented by R. Every material has its own resistance. In the case of conductors, heat is emitted whenever a current passes through them. Resistance depends on the resistivity of the material. Resistivity is a characteristic of the material used to fabricate electrical components, whereas the...
06:30
Bioassays for Monitoring Insecticide Resistance
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Cited by 45 •
2010
This manuscript demonstrates and discusses techniques used to survey pesticide susceptibility and detect resistance to contact and systemic pesticides in arthropod pests.
13:06
In Ovo Electroporations of HH Stage 10 Chicken Embryos
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Cited by 19 •
2007
Chick in ovo electroporation is a technique which allows genetic manipulation of the avian embryo. Common applications of this technique include functional analysis of genes and putative enhancer elements. This video demonstrates neural tube electroporation in HH 10 chick embryos. Injection technique and proper egg handling are discussed.
08:46
Implementation of In Vitro Drug Resistance Assays: Maximizing the Potential for Uncovering Clinically Relevant Resistance Mechanisms
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Cited by 2 •
2015
Drug resistance to targeted therapeutics is widespread and the need to identify mechanisms of resistance--prior to or following clinical onset--is critical for guiding alternative clinical management strategies. Here, we present a protocol to couple derivation of drug-resistant lines in vitro with sequencing to expedite discovery of these mechanisms.
FAQs
During the Resistance Stage, continued activity in the sympathetic nervous system and hypothalamic-pituitary-adrenal axis keeps stress hormones, including cortisol, elevated while the person faces ongoing demands. This sustained signaling helps preserve short-term performance and coping rather than ending after the initial reaction. Its significance is that adaptation carries a physiological cost when the stressor remains present.
An important distinction is duration and consequence. The early alarm reaction initiates the stress response, whereas resistance reflects continued activation as the person attempts to maintain functional balance. In the short term, that continuation may support coping and performance. If activation persists, however, physiological resources are consumed, creating conditions in which sleep, mood, immunity, and concentration may deteriorate.
Cortisol represents one of the stress hormones sustained during this phase. Its continued release reflects ongoing hypothalamic-pituitary-adrenal activity while the person adapts to persistent demands. The hormone is therefore part of the mechanism linking psychological stress with bodily regulation. When activation lasts too long, the associated physiological demand may contribute to problems involving sleep, mood, immunity, and concentration.
In psychological assessment, the model directs attention to both ongoing stress exposure and coping demands, not only to the presence of an initial stress reaction. Clinicians can consider whether persistent demands are accompanied by difficulties in sleep, mood, immunity, or concentration. This framing helps connect a person’s functioning with the duration and physiological burden of stress.
The concept helps explain why chronic stress may continue affecting a person after an immediate challenge has passed. It links persistent demands with sustained stress-system activity and the gradual consumption of physiological resources. In psychological research and practice, this connection provides a framework for examining coping over time and distinguishing temporary performance support from longer-lasting impairment.
Interventions informed by this model focus on reducing persistent stress exposure and addressing coping demands. The goal is not simply to describe the stress response, but to limit the conditions that keep sympathetic and hypothalamic-pituitary-adrenal activity engaged. This approach is relevant when ongoing activation is associated with impaired sleep, mood, immunity, or concentration, because those outcomes signal reduced adaptation.