The finer-size sand and clay which fill the spaces between the larger clasts is often deposited later on top of the large clasts and then sifts down between them to fill the interstitial spaces. The deposition of a chemical cement then binds the sediment into a rock. Conglomerate has very few commercial uses.
The brain is particularly sensitive to changes in the sodium level in blood. Therefore, symptoms of brain dysfunction, such as sluggishness (lethargy) and confusion, occur first. If the sodium level in blood falls quickly, symptoms tend to develop rapidly and be more severe.
Hyponatraemia is a low level of sodium in the blood. Symptoms are not usually very specific and can include changes to a person's mental state, headache, nausea and vomiting, tiredness, muscle spasms and seizures. Hyponatraemia may be caused by drinking too much water, for example during strenuous exercise, without adequate replacement of sodium.