Which of the Following Statements Is NOT a Reason for Maintaining

Multiple Choice

Which of the following statements is NOT a reason for maintaining relatively constant blood calcium levels?

A) Many enzymes need calcium as a cofactor.
B) The heart may stop if the calcium level is too high.
C) Respiration may stop if the calcium level is too low.
D) Blood clotting requires calcium.
E) Insulin cannot form if the calcium level is too high.