Related Experiment Video

Updated: Aug 12, 2026

Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory
06:00

Experimental Protocol for Using Drosophila As an Invertebrate Model System for Toxicity Testing in the Laboratory

Published on: July 10, 2018

Relation between quantities of lead ingested and health effects of lead in humans

K R Mahaffey

    Pediatrics
    |March 1, 1977
    PubMed

    More Related Videos

    Vinyl Chloride and High-Fat Diet as a Model of Environment and Obesity Interaction09:15

    Vinyl Chloride and High-Fat Diet as a Model of Environment and Obesity Interaction

    Published on: January 12, 2020

    Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance08:08

    Rearing the Cabbage White Butterfly (Pieris rapae) in Controlled Conditions: A Case Study with Heavy Metal Tolerance

    Published on: August 18, 2023

    Related Concept Videos

    Biological Effects of Radiation02:59

    Biological Effects of Radiation

    All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they produce ions...
    Pharmacokinetic–Pharmacodynamic Relationship: Intensity of Dose-Effect Relationship01:23

    Pharmacokinetic–Pharmacodynamic Relationship: Intensity of Dose-Effect Relationship

    Pharmacodynamics explores the relationship between drug concentration and its effect. In a quantal response drug, the duration of action better correlates with drug concentration, while for graded effect drugs, the intensity of response is more relevant. This intensity depends on the dose, drug removal rate, and the region of the concentration–response curve.The concentration–response curve can be divided into three regions. Region 3 (80–100% maximum response) demonstrates that even as drug...
    Toxicity Testing in Animals01:23

    Toxicity Testing in Animals

    Toxicity tests in animals are grounded on two main assumptions: first, the effects observed in laboratory animals can be extrapolated to humans, especially when adjusted for body surface area; second, high-dose exposure in animals is essential to identify potential human hazards from lower doses. This is based on the quantal dose-response concept, which faces the challenge of extrapolating results from relatively few test animals to much larger human populations. For example, a 0.01% incidence...
    Study Designs in Epidemiology01:20

    Study Designs in Epidemiology

    Epidemiological study designs are fundamental tools for investigating the distribution, determinants, and control of health conditions in populations. They help researchers understand the relationships between exposures and outcomes, and they broadly fall into two categories: "observational" and "experimental" studies.
    Observational studies are those where the researcher does not intervene but rather observes natural variations. They include cross-sectional, cohort, and case-control studies.
    Criteria for Causality: Bradford Hill Criteria - II01:28

    Criteria for Causality: Bradford Hill Criteria - II

    The Bradford Hill criteria serve as guidelines for establishing causative links in epidemiological research. Beyond Strength, Consistency, Specificity, and Temporality, key criteria also include Biological Gradient, Plausibility, Coherence, Experiment, and Analogy. These principles assist scientists in assessing the likelihood of causation in complex biological contexts. Below is a summary of these concepts:
    Relative Risk01:12

    Relative Risk

    Relative risk (RR) is a statistical measure commonly used in epidemiology to compare the likelihood of a particular event occurring between two groups. This metric is important for evaluating the relationship between exposure to a specific risk factor and the probability of a particular outcome. It plays a crucial role in medical research, public health studies, and risk assessment. Relative risk quantifies how much more (or less) likely an event is to occur in an exposed group compared to an...