Which of the Following Statements Is NOT True of Prophylactic

question 46

Multiple Choice

Which of the following statements is NOT true of prophylactic agents?

• A) Some drugs, such as tetracycline and sulfonamides, increase the possibility of photosensitivity, so sunscreens should be used when one is exposed to UV waves.
• B) Sunscreens have no effect on premature aging or in precancerous conditions, although these products do prevent cancer.
• C) SPF is the ratio between the exposure of UVR waves and the time required to cause erythema with or without sunscreen.
• D) The higher the SPF, the longer it takes to develop a tan, but this allows the person to stay in the sun longer.

---

Definitions:

Cerebrospinal Fluid

A clear, colorless body fluid found in the brain and spinal cord, it acts as a cushion for the brain's cortex, providing basic mechanical and immunological protection to the brain inside the skull.

Amphetamine

A potent central nervous system stimulant used to treat attention deficit hyperactivity disorder (ADHD) and narcolepsy, and recreationally as a performance enhancer and euphoriant.

Blood-Brain Barrier

A selective permeability barrier that protects the brain from foreign substances in the blood that may injure the brain.

Endothelial Membrane

A thin layer of cells that lines the interior surface of blood vessels and lymphatic vessels, forming an interface between circulating blood or lymph in the lumen and the rest of the vessel wall.