How many different minerals are essential for nutrition?

Which of the following statements regarding a decreased level of consciousness in the elderly patient is correct?

A. A decreased level of consciousness is not a normal part of the aging process. B. Most elderly patients have some deterioration in their level of consciousness. C. A decreased level of consciousness is most often the result of chronic dementia. D. The AVPU scale is an ineffective tool when assessing an elderly patient's level of consciousness.

Which statement best describes the repolarization process?

A) The nerve membrane has reestablished a potential of +70 mV. B) Positively charged sodium ions return to the axoplasm due to the negative charge of the axoplasm during polarization. C) Positively charged sodium, calcium, and potassium ions are actively transported from the axoplasm to the extracellular environment. D) Calcium ions re-bind to the receptor sites to ensure that Na+ will not continue to depolarize the axoplasm.