Answer:
The most appropriate answer would be option 2.
In humans, the color of the eyes was thought as a simple Mendelian trait however, it has been found that the color of the eye follows polygenic inheritance, that is, it is determined by multiple genes.
A set of 15 genes is responsible for the color of the eyes. Two genes out of these 15 are OCA2 and HERC2 which are present on chromosome 15.
Thus we can conclude that eye colour is polygenic trait which does not follow Mendelian genetics.
A normal IV bag contains a saline solution. This means that it contains water mixed with sodium chloride though sometimes it may be water mixed with dextrose. Both of these are additives used to normalize tonicity.
Tonicity is a measurement of osmotic pressure. What this means is that it measures how likely it is for water to be drawn to it and is based on the concentration of solutes. There are 3 measurements for tonicity
- Hypertonic
- Hypotonic
- Isotonic
These measurements tell us whether water is likely to be drawn in, repelled, or not move at all. This will depend on the concentration of solutes and water on the inside and outside of a cell. If a patient is given normal water, the water will dissolve the solutes outside of a cell and cause a pressure gradient that will cause water to be drawn into a cell until it inevitably explodes. This death of the blood cells is known as hemolysis. To avoid this, additives like Dextrose or sodium chloride are added, to equalize tonicity.
Though dextrose is often used, the most common solution for an IV bag is the saline solution made from water and sodium chloride (salt). The addition of additives like salt or dextrose (a type of sugar) is important in order to normalize tonicity and avoid hemolysis.
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<span>
Oxygen will diffuse from an area of higher concentration (outside the cell) to an area of lower concentration (inside the cell). </span>
Answer:
D. All of the above
Explanation:
Can't see option C, but since the other two options are functions of the immune system, I assume it'd be true. The immune system is meant to protect the body from infections.
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