Which of these routes of drug administration is easy, convenient and inexpensive?

Correct Answer: D

Rationale: Ease, convenience, and cost favor a drug route requiring minimal equipment or expertise. 'Oral,' is correct because it involves swallowing a pill, needing no needles or medical staff, as per pharmacoeconomics (e.g., DiPiro's Pharmacotherapy). 'Intramuscular,' requires injections, less convenient. 'Intravenous,' needs IV setup, costly and complex. 'Subcutaneous,' also involves needles, less simple. Oral administration's widespread use—cheap, self-administered, and non-invasive—makes D the standout answer, reflecting its practicality in outpatient care.

Correct Answer: D

Rationale: A good research topic should be clear, measurable, and relational. 'Must have at least one variable,' is correct as the exception because a topic may broadly identify an area without specifying variables initially (e.g., Nurse burnout'), per research design (e.g., Leedy & Ormrod). 'Must state relationship between variables,' ensures focus. 'Must be clear and unambiguous,' aids understanding. 'Variables must be measurable,' ensures testability. Topics can start general, refining variables later, making D the least essential trait.

Correct Answer: B

Rationale: Tactile cells (Merkel cells) in the skin detect touch and pressure. 'Tactile cells,' is correct, linked to sensory nerve endings, per histology (e.g., Ross & Pawlina). 'Dendritic cells,' are immune-related. 'Keratinocytes,' form the skin barrier, not sensory. 'Melanocytes,' produce pigment. Tactile cells' mechanoreceptor role makes B the accurate answer.

Correct Answer: A

Rationale: Failed to generate a rationale of 500+ characters after 5 retries.

Correct Answer: C

Rationale: The anterior pituitary secretes trophic hormones regulating growth and glands, but oxytocin comes from the posterior pituitary. 'Oxytocin,' is correct as the exception, per endocrinology references like Costanzo's Physiology. 'Growth hormone,' stimulates growth. 'Prolactin,' promotes lactation. 'Adrenocorticotrophic hormone,' targets adrenals. Oxytocin, stored and released by the posterior pituitary after hypothalamic synthesis, aids labor and lactation, making C the precise answer, distinct from anterior pituitary functions.