Volume is the amount of space the matter takes up, density is mass OF the volume
Answer: Neurone or Nerve cell
Explanation:
Answer:Heme, ferrous state (Fe 2+ )
Explanation:
Heme is a coordination complex which consists of an iron ion coordinated to a porphyrin acting as a tetradentate ligand, and to one or two axial ligands.
Four heme groups makes up each haemoglobin and they surround the globin group to form a tetrahedral structure. Heme composes of a ringlike organic compound known as a porphyrin to which an iron atom is attached. The four iron atoms in each haemoglobin binds with four atom of oxygen as the blood travels between the lungs. During Digestion and absorption, Iron ions undergo two changes of oxidation state.
The first, occurs in the stomach, where Iron (III) is reduced to iron (II)
and the second occurs in the duodenum where free iron (II) ions are oxidized to iron (III).
Myoglobin also contains hemes, which makes colour of red meat. The colour that meat assumes is partly determined by the degree of oxidation of the myoglobin. Most times the oxidation state is in the ferrous state.
<span>Mass is a property that determines how much effort it takes to change somethings velocity. Weight is how much downward force does something exert in a gravitational field which is just the amount of gravity time the mass of an object. We use mass interchangeable with weight because everything on earth experiences the same amount of gravity or close to it, and so something that weighs twice as much as something else also has twice as much mass as that something else. Weight can actually vary for the same mass here on earth the strength of gravity changes from one place to another by small amounts, not enough to ruin your cooking recipe instructions, and weight can change dramatically for something that is falling, the strength of gravity for astronauts in orbit is not much reduced in comparison to here on earth, if there was no gravity they wouldn't go around the earth, they are weightless because they are falling and have enough sideways velocity to keep missing the earth, but their mass has not changed, it still requires effort to get them moving or to stop them.
</span>
