Answer: 3. 7-10% of CO2 is dissolved directly into the plasma
Explanation:
Carbon dioxide molecules are transferred by one of three methods into the blood from body tissues to the lungs including binding to haemoglobin, movement as a bicarbonate ion and absorption directly into the blood. Various carbohydrate properties in the blood influence its movement that are as following:
- Carbon dioxide is more soluble than oxygen in the blood. The plasma dissolves about 5 to 7 per cent of all carbon dioxide.
- Carbon dioxide may bind to plasma proteins, or may penetrate red blood cells and bind to haemoglobin and form carbaminohemoglobin which cover 20% of CO2.
Hence, the correct option is 3.
The right answer is myelin.
Vitamin B12, also called cobalamin is a vitamin B group, so it is water soluble. It is a very important vitamin for the functioning of the brain, the nervous system and in the synthesis of DNA. This vitamin must be provided by the diet, the populations most at risk of deficiency are vegans as well as the elderly because of their low consumption of food of animal origin.
Vitamin B12 is essential for the good health of the nervous system: It is particularly at the level of the myelin sheath that vitamin B12 plays a role in thus participating in the protection of nerve cells.
(Sweetened iced tea) is a solution in which solid sugar (the solute) is dissolved in cold liquid tea, which is mostly water (the solvent).
I’m pretty sure it’s melanin
