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Related Concept Videos

Stimulants01:29

Stimulants

Stimulants are substances that enhance neural activity and elevate dopamine levels in the brain, leading to their highly addictive nature. These drugs include cocaine, amphetamines, MDMA, caffeine, and nicotine, each with distinct mechanisms of action and varied health implications.
Cocaine can be administered via snorting, injection, or smoking. It primarily functions by blocking the reuptake of dopamine, resulting in a euphoric high characterized by an intense sensation of happiness and...
Vaporization01:18

Vaporization

The physical form of a substance changes by changing its temperature. For example, raising the temperature of a liquid causes the liquid to vaporize (convert into vapor). The process is called vaporization—a surface phenomenon. For vaporization to occur, kinetic energy must be greater than the intermolecular forces that keep molecules bonded. The amount of energy needed to vaporize a quantity of liquid at a given pressure and a constant temperature is called the heat of vaporization. When...
Drugs Acting on Autonomic Ganglia: Stimulants01:23

Drugs Acting on Autonomic Ganglia: Stimulants


Ganglionic stimulants activate NM nicotinic receptors in autonomic ganglia, falling into two categories: nicotine mimetics [e.g., lobeline, dimethylpiperazine, tetramethylammonium] and muscarinic receptor agonists [e.g., muscarine, methacholine]. The first category's action is rapid and blocked by nicotinic receptor antagonists, while the second category's action is delayed and blocked by atropine-like agents. Nicotine, an alkaloid, affects the heart rate by stimulating sympathetic or...

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Related Experiment Video

Updated: May 28, 2026

Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System
10:44

Comparing the Effects of Electronic Cigarette Vapor and Cigarette Smoke in a Novel In Vivo Exposure System

Published on: May 24, 2017

Electronic-cigarette smoking experience among adolescents.

Jun Ho Cho1, Eunyoung Shin, Sang-Sik Moon

  • 1Department of Health Administration, Hanyang Women's University, Seoul, Republic of Korea.

The Journal of Adolescent Health : Official Publication of the Society for Adolescent Medicine
|October 25, 2011
PubMed
Summary

Adolescent awareness of electronic cigarettes (e-cigarettes) is low, with the internet and friends being primary information sources. Male gender, peer influence, and prior smoking experience predict e-cigarette use in teens.

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Published on: August 25, 2018

Area of Science:

  • Public Health
  • Adolescent Health
  • Tobacco Control

Background:

  • Electronic cigarette (e-cigarette) use among adolescents is a growing public health concern.
  • Understanding adolescent awareness, exposure routes, and predictors of e-cigarette use is crucial for targeted interventions.

Purpose of the Study:

  • To assess adolescent awareness and information sources regarding e-cigarettes.
  • To identify factors influencing adolescent e-cigarette experimentation.

Main Methods:

  • Analysis of data from the 2008 Health Promotion Fund Project in Korea.
  • Hierarchical logistic regression used to identify predictors of e-cigarette use among adolescents in five Korean schools.

Main Results:

  • 10.2% of students had heard of e-cigarettes; 0.5% had tried them.
  • Primary information sources included the internet (46.4%) and friends (27.9%).
  • Significant predictors of e-cigarette use were male gender, perceived peer influence, school life satisfaction, and prior cigarette smoking experience.

Conclusions:

  • E-cigarette marketing, particularly online, requires scrutiny to protect adolescents from unsubstantiated claims.
  • Targeted health education on e-cigarette risks is necessary for vulnerable adolescent populations.