You are currently browsing the archives for the Environmental Toxicology: Diary and Notes category.

Catabolic reaction (Phase I)

This include oxidation, reduction and hydrolisis.
Oxidation
It occurs when a molecule combines with oxygen, loses hydrogen, or loses one or more electrons.
Many toxicants are metabolized by the enzymes cytochrome P-450 reductase and cytochrome P-450 in association with NADPH (co-enzyme: nicotinamide adenine dinucleotide phophate). These enzymes are abundance in endoplasmic reticulum of liver cells for detoxification.

Reduction
Occurs […]

Distribution

What structure plays important role for distribution?
How circulatory system structured?
Is there any barrier for distribution?
What structure plays important role for distribution?
Absorption into and out to bloodstream occurs in the circulatory system which is the capillaries, inhaled toxicants diffuse accross the alveoli.
How circulatory system structured?
It is composed of the heart along with an extensive system of […]

Active Transport

Another type of transport process. This post will cover some of these questions that may arise.
What are kind of active transport?
What are those process?
Why it is important for the process of absorption?
What are the examples of active transport?

What are kind of active transport?
This include carrier mediated transport, phagocytosis and pynocitosis.
What is definition of active […]

Passive Diffusion

There are several factors of passive diffusion to occur. The most basic thing is that, passive diffusion is mostly occur during the process of absorption. Diffusion also has rate, which are also affected by several things. This post will also give brief example of passive diffusion and about another type of diffusion.

What are factors […]

Absorption

The absorption occurs depend on the substance. There are substances that are not readily absorped by our skin. Therefore it is important to know what substance that can be absorped by cells. Several factors affect the absorption rate will be brifly mentioned here, including mechanisms and vatious types.

What substance that can be absorbed by […]

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