On what does the movement of gases between the lungs and the body tissues mainly depend?

The hepatitis B vaccine is ________ immunity

A) induced active B) naturally acquired C) acquired passive D) induced passive

Patients with dementia often have reduced levels of melatonin which can lead to:

A) impairment of the sleep-wake cycle. B) decrease in calcium in the bones. C) an increase in the inflammatory process. D) decreased absorption of medications.