Does hemoglobin carry oxygen, carbon dioxide, nitric oxide, or all of them?

Question

Does hemoglobin carry oxygen, carbon dioxide, nitric oxide, or all of them?

Answer 1

All three.  While most CO2 leaves the body by being dissolved in blood plasma, hemoglobin does carry some of it.  Hemoglobin also carries nitric oxide which actually increases the affinity of hemoglobin for oxygen.

Answer 2

hemoglobin can carry all three  the CO2 does not bind at the oxygen binding site but rather in the salt bridges in the beta chains . NO is a powerful vasodialator  and smooth muscle relaxant and helps ease blood flow in tight areas in particular. NO reacts with deoxyhemoglobin to form the nitrosyl Hb product ( at the O2 binding site ) while NO interacts with oxygenated hemoglobin to produce nitrate and Fe+3Hb  ( methemoglobin)

Answer 3

Hemoglobin is a protein that is carried by red cells.

It is only a comonent of blood, it carries oxygen. it is made of two similar proteins that "stick together". Both proteins must be present for the hemoglobin to pick up and release oxygen normally. One of the component proteins is called alpha, the other is beta.

Blood carries all three, hemoglobin by association does too, but it is NOT is role.

This is  very basic medical school stuff here folks.