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Asked by BRENDA to Peter, Jonathan, Grace, Doris, David, Ann on 28 May 2019.
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Jonathan Abuga answered on 28 May 2019:
Two questions
1. HIV virus is adapted to invade the human immune system. However, there are other viruses that similar to the HIV virus which are known to affect animals.2. The red pigment in blood, haemoglobin, gives colour to blood
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Doris Nyamwaya answered on 28 May 2019:
HIV means Human immunodeficiency virus- It results to reduction of the body’s power to evade infections. As much as it occurs in humans, it originally occurred in primates like gorillas and it was then called SIV meaning simian immunodeficiency virus.
2. Blood is red because it contains a pigment called haemoglobin which is red. This pigment is found in red blood cells. If these cells are removed, the blood becomes colourless
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Grace Kago answered on 28 May 2019:
1. HIV/AIDS affects humans because it has adapted to infect humans specifically. Viruses in general are very clever in that they adapt quickly to evade the immune response of the host. HIV is particularly cunning.
2. Blood is red due to the presence of red blood cells which contain a protein called hemoglobin. The structure of this protein was solved in 1959, and if you examine it, you’ll observe that it is made of four components that bind iron. What’s really cool is that it is this iron which binds to oxygen and shuttles it all around our bodies! So: what does this have to do with blood being red, though? Chemicals appear specific colors to us based on which wavelengths of light they reflect. Hemoglobin, once it binds oxygen, will absorb blue-green light, which means that it reflects red-orange light into our eyes, appearing red. -
Peter Macharia answered on 28 May 2019:
Hi Brenda,
1. They are different Immunodeficiency viruses, Like Human Immunodeficiency virus(HIV) and Simian Immunodeficiency Virus (SIV). HIV categorically has adapted and is specific to human. I would say SIV is the HIV version in apes (animals).
2.blood has red and white blood cells. The red blood cell has a molecule called haemoglobin (that transports oxygen in the body). Haemoglobin is made up of proteins, one protein binds with another structure called heme which gives blood the red colour
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