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A substance or complex of substances called prothrombin activator is formed in response to rupture of vessels or damage to the blood itself. The detailed
mechanism by which prothrombin activator is formed are still incompletely
understood, however, both involves a series of plasma proteins, especially beta-
globulins which along with other blood clotting factors like factor IV
(calcium)enter into clotting process.
2.Prothrombin activator catalyzes the conversion of prothrombin into thrombin in the presence of calcium. 3.The thrombin acts as an enzyme to convert fibrinogen into fibrin threads that enmesh platelets, blood cells and plasma to form a hard blood clot. Citrates and oxalates which are commonly used as anticoagulants are effective
because they remove calcium from the blood by formation of insoluble citrate or oxalate
salts of calcium. If calcium is added in excess the clotting power of blood is restored.
In formation of oxy-hemoglobin, oxygen does not combine with two positive
valences of the ferrous iron in the hemoglobin molecule. Instead, it binds loosely with
one of the six "coordination" valences of the iron atom. This is an extremely loose bond
so that combination is reversible. Furthermore, the oxygen does not become ionic oxygen
but is carried as molecular oxygen to the tissue where it is released into the tissue fluids
in the form of dissolved molecular oxygen rather than ionic oxygen. This explains why
blood does not rust despite having the all necessary substrates for the formation of the
rust
Wiki User
∙ 12y ago
The iron in blood is bound to proteins like hemoglobin, which prevents it from coming into contact with oxygen and water that are needed for rusting. Additionally, the iron in blood is constantly being recycled by the body and is not exposed to the external environment where rusting can occur.
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What two substances must be present for iron to rust?
Iron must come into contact with oxygen and water for it to rust. This process is known as oxidation, where the iron reacts with oxygen in the presence of water to form iron oxide, the reddish-brown compound known as rust.
If iron rusts outside our body why doesn't it rust in our blood?
Iron in our blood is bound to proteins like hemoglobin, which protects it from rusting. The iron in our blood is in a different form (ferrous) compared to the iron that rusts (ferric). Additionally, our body has mechanisms to regulate iron levels and prevent oxidation.
What happen when iron is exposed to air?
When iron is exposed to air and moisture, it undergoes a chemical reaction called oxidation, which forms iron oxide, commonly known as rust. Rust is a reddish-brown compound that can weaken and corrode the iron, eventually causing it to deteriorate over time. Regular maintenance and protective coatings can help prevent rusting.
Is rust an element?
Rust is not an element, but rather iron oxide, a compound formed from the reaction of iron and oxygen.
Is rust a compound?
yes rust is a compound because it is a formed by the reaction between Iron and Oxygen. These two react to give Iron Oxide which is called as rust. Edited by Dr.J. - The iron oxides that is rust is the Fe2O3 variety.
Why does blood smell like rust?
Rust is brown because of the metals they form on. It is caused by the iron oxide coating typically found on iron and steel. The colors are caused by the reaction of that coating with moisture and oxygen.
You get rust as the final product due to the reaction between iron and oxygen then why do not you get rust despite having both iron and oxygen in our blood?
because you need to have solid iron for it to rust
Why does an iron nail rust?
Iron present in the nail oxidizes in oxygen to form the iron oxides
What is the metal that needs to be present for rust to occur?
FE or Iron
What element makes blood red?
There is a substance called iron in your blood. As you probably know, when iron is exposed to oxygen, it immediately starts to rust, which rust is red. Therefore, when the iron in your blood "rusts'' so to speak, it turns your blood red.
Why do weather rocks have rust streaks?
Some weathered rocks have rust streaks due to the iron content in the rocks. When rocks that have ferrous iron are weathered there will be rust streaks present.
What two things need to be present for iron to rust?
Water and oxygen
Is rust a physical or a chemical?
Rust would be a chemical change. Rust is often called oxidized iron because oxygen atoms combine with iron and turn red, just like the red blood cells in your blood stream. When the oxygen in your lungs meets the iron in your blood cells, or when the iron in a nail combines with oxygen in the air, you get that rusty red color.
Which two substances must be present for an iron object to rust?
For the oxidation of iron to occur, that is for ferric oxide to form, there must be oxygen present. There must also be water present.
Does water make iron go rusty?
Yes, as long as oxygen is present aswell, iron will rust.
Which must be present for a piece of iron to rust?
Rusting is the reaction of iron with oxygen in the presence of water.
How does iron react with deionized water?
Iron reacts slowly with deionized water to form iron hydroxide and hydrogen gas. The reaction is enhanced when oxygen is present, leading to the formation of rust (iron oxide).
