Correct Answer: B

Rationale: Buccal medication is administered by placing it between the client's cheeks and gums. This route allows for the medication to be absorbed through the mucous membranes in the mouth, providing a rapid onset of action compared to oral ingestion. Placing the medication under the tongue (sublingual) allows for absorption through the sublingual mucosa, not the buccal mucosa. Placing medication on the skin or the conjunctiva is not appropriate for buccal administration.

Correct Answer: A

Rationale: The left atrium receives oxygenated blood from the lungs via the pulmonary veins. This oxygen-rich blood is then pumped into the left ventricle before being circulated throughout the body. The right atrium, on the other hand, receives deoxygenated blood from the body via the vena cava.

Correct Answer: B

Rationale: The knee-chest position is correctly identified as the genu-pectoral position. In this position, a person rests on their knees and chest with the abdomen raised and the head turned to one side. This position is commonly used in medical examinations and procedures involving the rectal or pelvic areas, allowing for better visualization and access.

Correct Answer: A

Rationale: The correct abbreviation for drops in medical terminology is 'Gtt.' It stands for 'guttae,' which is the Latin word for drops.

Correct Answer: D

Rationale: Alzheimer's disease is the most common cause of dementia among elderly persons. It is a progressive neurodegenerative disorder that affects memory, thinking, and behavior. While Parkinson's disease, multiple sclerosis, and amyotrophic lateral sclerosis are serious conditions, they are not typically associated with dementia in the same way Alzheimer's disease is.