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The Periodic Table and Organismal Elements

The Periodic Table and Organismal Elements

Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally occurring, and only a few of them are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.
Periodic Table Provides Information...

The Periodic Table and Organismal Elements

The Periodic Table and Organismal Elements

Elements are the smallest units of matter that cannot be broken down further by chemical processes. There are 118 known elements, but not all of these are naturally-occurring, and fewer still are essential for life. Living matter is composed primarily of carbon, nitrogen, hydrogen, and oxygen, with smaller amounts of other elements like calcium, phosphorus, potassium, and sulfur. Other elements are also necessary for life but only in trace amounts.The Periodic Table Provides Information about...

Types of Toxins

Types of Toxins

Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...

Toxidromes: Clinical Features

Toxidromes: Clinical Features

Toxidromes are specific patterns of symptoms resulting from toxic substance exposure. They help in the identification and treatment of poisoning. The symptoms of each toxidrome group indicate poisoning by a certain class of chemicals or drugs.1. Sympathomimetic: Stimulates the sympathetic nervous system. Symptoms include agitation, increased heart rate (HR), blood pressure (BP), respiratory rate (RR), temperature, and pupil size. Drugs like cocaine and amphetamines, along with tremors and...

Anticholinesterase Agents: Poisoning and Treatment

Anticholinesterase Agents: Poisoning and Treatment

Anticholinesterases, also known as cholinesterase inhibitors, work by blocking the breakdown of acetylcholine, leading to its accumulation in the synaptic cleft. This accumulation indirectly enhances both muscarinic and nicotinic actions. These agents are classified as reversible or irreversible based on their mechanism of action.
Irreversible agents form a strong bond with the cholinesterase enzyme, making it inactive. The breakdown of the phosphorylated enzyme is slower than the...

Antidotes

Antidotes

Antidotes are medicinal substances used to counteract the harmful effects of toxins or drugs in the body. They function in various ways, each uniquely designed to combat specific toxic compounds.
Specific antidotes operate by inhibiting the enzymes that control biochemical pathways, reducing the production of harmful metabolites.
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Related Experiment Video

Updated: Jun 11, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

[Mercury poisoning].

L Bensefa-Colas¹, P Andujar, A Descatha

¹Service de pathologie professionnelle, groupe hospitalier Cochin-Saint-Vincent-de-Paul, AP-HP, 27, rue du Faubourg-Saint-Jacques, 75014 Paris, France. lynda.bensefa@cch.aphp.fr

La Revue De Medecine Interne

|June 29, 2010

Summary

Mercury exposure poses severe health risks, with toxicity varying by its chemical form. Understanding mercury

Area of Science:

Environmental Health
Toxicology
Clinical Medicine

Context:

Mercury is a pervasive heavy metal contaminant.
Human health impacts are contingent on mercury's chemical form (elemental, inorganic, organic).
Clinicians require updated knowledge on mercury toxicity.

Purpose:

To review and synthesize essential knowledge on mercury and its organic compound toxicity for clinicians.
To provide a comprehensive overview of mercury's health effects and management.

Summary:

Acute mercury vapor inhalation affects the lungs, while chronic exposure leads to neurological and renal damage.
Methylmercury from contaminated food causes severe neurological issues, especially in developing children.
Chelating agents are recommended for acute mercury poisoning and may benefit chronic cases.

More Related Videos

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

Published on: January 8, 2016

Related Experiment Videos

Last Updated: Jun 11, 2026

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

An Anaerobic Biosensor Assay for the Detection of Mercury and Cadmium

Published on: December 17, 2018

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

A Study of the Complexation of Mercury(II) with Dicysteinyl Tetrapeptides by Electrospray Ionization Mass Spectrometry

Published on: January 8, 2016

Impact:

Highlights the need for environmental mercury reduction and managing low-level exposures (e.g., dental amalgam, fish).
Informs clinical practice regarding diagnosis and treatment of mercury intoxication.
Supports occupational health policies for mercury-related disorders.