Ques: Q: Abnormally high activity or low activity of the parathyroid gland can cause disorders related to levels of what bone mineral? Read this paragraph and choose the correct option from the provided answers: Abnormally high activity of the parathyroid gland can cause hyperparathyroidism, a disorder caused by an overproduction of PTH that results in excessive calcium reabsorption from bone. Hyperparathyroidism can significantly decrease bone density, leading to spontaneous fractures or deformities. As blood calcium levels rise, cell membrane permeability to sodium is decreased, and the responsiveness of the nervous system is reduced. At the same time, calcium deposits may collect in the body's tissues and organs, impairing their functioning. In contrast, abnormally low blood calcium levels may be caused by parathyroid hormone deficiency, called hypoparathyroidism, which may develop following injury or surgery involving the thyroid gland. Low blood calcium. Choices: - potassium - collagen - magnesium - calcium A:
Ans: calcium

Ques: Q: What is the term for diseases in which blood does not clot normally? Read this paragraph and choose the correct option from the provided answers: Hemophilia is a group of diseases in which blood does not clot normally. Factors in blood are involved in clotting. When you bleed, your body begins a coagulation cascade of reactions, involving special proteins known as coagulation factors, to stop that bleeding. When one or more of these clotting factors are missing, there is a higher chance of having dificulties stoping the bleeding. Hemophiliacs lacking the normal Factor VIII are said to have Hemophilia A (or Factor VIII deficiency), the most common form. Hemophilia is a genetic disease, passed down through family. It is linked to the X-chromosome, so it mostly affects males. F8 is the gene for the Factor VIII protein. Mutations in the F8 gene lead to the production of an abnormal version of coagulation factor VIII, or reduce the amount of the protein. The altered or missing protein cannot participate effectively in the blood clotting process. Choices: - arthritis - diabetes - lymphoma - hemophilia A:
Ans: hemophilia

Ques: Q: What mineral is used to produce glass? Read this paragraph and choose the correct option from the provided answers: Silver is used to make sterling silver jewelry. Table salt is the mineral halite. Glass is produced from the mineral quartz. Choices: - lead - feldspar - pyrite - quartz A:
Ans: quartz

Ques: Q: The negative logarithm of the hydroxide-ion concentration of a solution is called? Read this paragraph and choose the correct option from the provided answers: As with the hydrogen-ion concentration, the concentration of the hydroxide ion can be expressed logarithmically by the pOH. The pOH of a solution is the negative logarithm of the hydroxide-ion concentration. Choices: - the hil - the hop - the piel - the poh A:
Ans:
the poh