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Related Concept Videos

Punishment01:27

Punishment

Negative reinforcement and punishment are often confused but serve distinct functions in behavior modification. Reinforcement, whether positive or negative, increases the likelihood of a desired behavior, while punishment decreases it.
Punishment can be positive or negative. Positive punishment involves adding an undesirable stimulus, such as scolding, to decrease a behavior. Negative punishment involves removing a desirable stimulus, such as taking away a favorite toy, to decrease behavior.
Bile01:19

Bile

Bile is a crucial bodily fluid, characterized by its yellow-green color and alkaline nature. Produced in the liver, it is transported through the common hepatic duct into either the cystic duct, leading to the gallbladder, or directly into the common bile duct. The flow of bile is regulated by the sphincter of Oddi located at the entrance of the duodenum. When this sphincter is closed, bile is redirected to the gallbladder for storage and concentration.
Bile is released when dietary fats enter...
Flail Chest-II01:26

Flail Chest-II

Managing flail chest, a condition characterized by a segment of the chest wall moving independently from the rest of the thoracic cage, requires a comprehensive approach. It includes a thorough assessment of the patient's condition, a diagnostic evaluation to determine the extent of the injury, and the implementation of appropriate medical interventions tailored to the individual's needs.
Assessment:
1. Clinical Evaluation:
History:
The Calvin Benson Cycle01:46

The Calvin Benson Cycle

Ribulose 1,5- bisphosphate carboxylase/oxygenase (RuBisCo) is a critical enzyme that catalyzes carbon dioxide assimilation during photosynthesis. However, it is an inefficient enzyme, having an extremely slow catalytic rate. A typical enzyme can process about a thousand molecules per second; however, RuBisCo fixes only around three-carbon dioxides per second. Photosynthetic cells compensate for this slow rate by synthesizing very high amounts of RuBisCo, making it the most abundant single...
Flail Chest-I01:24

Flail Chest-I

Overview of Flail Chest
Flail chest is a severe and potentially life-threatening condition characterized by the fracture of three or more adjacent ribs in multiple places. It is most commonly caused by direct impacts and trauma, such as motor vehicle accidents or injuries from a steering wheel impact. It can also occur due to falls in elderly individuals with osteoporosis, or assaults involving sharp objects.
Pathophysiology
The pathophysiology of flail chest is complex, involving fractures of...
Bending01:10

Bending

Pure bending is a fundamental concept in structural mechanics, essential for understanding how materials deform under symmetrical loads without direct forces. Pure bending occurs when prismatic members, such as beams, are subjected to equal and opposite moments that induce bending. The phenomenon is crucial as it allows for predicting stress distributions without the influence of axial or shear forces.
In pure bending, the bending stress in a beam is calculated based on the bending moment and...

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Updated: May 8, 2026

A Naturalistic Setup for Presenting Real People and Live Actions in Experimental Psychology and Cognitive Neuroscience Studies
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A Naturalistic Setup for Presenting Real People and Live Actions in Experimental Psychology and Cognitive Neuroscience Studies

Published on: August 4, 2023

ERK plays the baddie (again).

Paul Dent1

  • 1Department of Neurosurgery; Massey Cancer Center; Virginia Commonwealth University; Richmond, VA USA.

Cancer Biology & Therapy
|September 13, 2013
PubMed
Summary
This summary is machine-generated.

The ERK1/2 pathway

Keywords:
ERKMKP1camptothecinhuman colon cancer

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Area of Science:

  • Oncology
  • Cellular Biology
  • Molecular Signaling

Background:

  • Elevated ERK1/2 pathway signaling is linked to tumor cell growth and survival.
  • A subset of studies indicates that enhanced ERK1/2 signaling can also induce tumor cell death.
  • The dual role of ERK1/2 in cancer necessitates a nuanced understanding.

Purpose of the Study:

  • To explore the complex and context-dependent role of the ERK1/2 pathway in cancer.
  • To investigate how ERK1/2 signaling influences tumor cell fate under various conditions.

Main Methods:

  • Review of existing literature on ERK1/2 signaling in cancer.
  • Analysis of studies demonstrating both pro-survival and pro-death roles of ERK1/2.
  • Examination of factors influencing ERK1/2 pathway activity and outcomes.

Main Results:

  • ERK1/2 pathway activation can promote tumor cell survival.
  • Conversely, ERK1/2 signaling can also mediate tumor cell death.
  • The outcome depends on tumor type, stimulation intensity, and therapeutic agents.

Conclusions:

  • The ERK1/2 pathway exhibits a complex, dual role in cancer cell survival and death.
  • Understanding these complexities is crucial for developing effective cancer therapies.
  • Therapeutic strategies targeting ERK1/2 must consider cell type and intervention specifics.