The instruments of Renaissance music Musical instruments have been in use for millennia, but their place in the music of the Middle Ages and Renaissance was often sharply defined and restricted. In the view of the MediÃ¦val church, the human voice was an instrument created by God, and thus more able to sing His glories than instruments created by people.
Low total calcium (hypocalcemia). The most common cause of low total calcium is: 1  Low blood protein levels, especially a low level of albumin, which can result from liver disease or malnutrition, both of which may result from alcoholism or other illnesses.2  Low albumin is also very common in people who are acutely ill. urine calcium test may be ordered when someone has symptoms of kidney stones, such as a sharp pain in the person's side or back around the kidneys, pain that may progress to lower in the abdomen, and/or blood in the urine.
The calcium level in blood can be moderately low without causing any symptoms. If levels of calcium are low for long periods, people may develop dry scaly skin, brittle nails, and coarse hair. Muscle cramps involving the back and legs are common.n hypocalcemia, the calcium level in blood is too low. A low calcium level may result from a problem with the parathyroid glands, as well as from diet, kidney disorders, or certain drugs.