The body uses atoms in different ways to accomplish different tasks. For example, one portion of the body's calcium supply strengthens bones, whereas another portion combines with proteins to stimulate blood clotting after tissue injury. Which of the
following statements provides the most logical chemical explanation of calcium's ability to perform such different functions?
A) The bone contains calcium salts, which are less reactive than the calcium ions found in the blood.
B) The calcium in blood is a more reactive form of the atom and therefore has fewer protons than the calcium in bone.
C) There are many different isotopes of calcium, and the most reactive isotope is found in the bone.
D) The calcium in blood has a lighter atomic mass than the calcium in bone and is in a more reactive form.
Answer: A
You might also like to view...
Which of the following processes are typically associated with the long-term carbon cycle? Select all that apply
A. respiration B. plate tectonics C. photosynthesis D. volcanic eruptions
What Takes Place During Anaphase I? - homologous pair - # of chromosomes - sister chromatids
What will be an ideal response?
Which of the following statements concerning ribosomes are true?
A. Ribosomes have a binding site for mRNA and three binding sites for tRNA molecules. B. No protein synthesis within a cell would occur without ribosomes. C. Several ribosomes are often attached to and translating the same mRNA. D. Ribosomes join amino acids to form a polypeptide. E. All of the above statements are true.
Laboratory fermentation tests often include a pH indicator because many bacteria produce (O2/bases/acids) as they ferment carbohydrates
What will be an ideal response?