I believe the answer is The second one, They have greater access to food in northern regions during the summer.
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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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Answer:
spatial summation
Explanation:
There are two types of neuron summation:
- temporal-multiple repeated signals (target neuron receives a single form one neuron that is repeated)
- spatial-multiple simultaneous signals from multiple synapses (target neuron receives few different inputs).
Since the signals might be excitatory (produce depolarization of the postsynaptic cell) or inhibitory (produce hyperpolarization) of the postsynaptic cell, their total sum might or might not trigger an action potential on neuron.
The actual synthesis is carried out by the ribosomes, small structures ...
The code for ordering the amino acids of a protein is written as a sequence of ...
or template for another kind of nucleicacid called RNA (ribonucleic acid)..
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