Acetylcholine
since rats are mammals, they are most definitely vertebrates.
They are Vertebrates, most of them have a spine which puts them in the vertebrate category!
Most likely they are living things.
they dont have a backbone
Vertebrates have an internal skeleton and invertebrates have external skeletons. Vertebrates are able to grow larger than invertebrates because of this. Invertebrates would crush themselves under their own skeletons if they grew to a large size.
most invertebrates are arthropods, and 70% of animals in the world are arthropods (insects), so I'm guessing there are more invertebrates than vertebrates.
Vertebrates have the same waste-disposal problems as invertebrates. They must deal with the very toxic ammonia their bodies produce, and most vertebrates must expel wastes while conserving water.
GABA (Gamma-AminoButyric Acid) is the most common neurotransmitter producing inhibition in the brain.
Dugongs are vertebrates. Most invertebrates are usually small.
Vertebrates have vertebra.Invertebrates don't.
salt
Glutamate