A drug aims to inhibit EGFR (Epidermal Growth Factor Receptor) in lung cancer cells. If this drug's delivery is inconsistent, which consequence follows regarding the cancer cell cycle?

💡 Explanation

Inconsistent EGFR inhibition leads to unsynchronized cell cycle progression. Because the mitotic checkpoint is weakened, cells can escape mitosis despite DNA errors (mitotic slippage). Therefore, aneuploidy, characterized by abnormal chromosome numbers, becomes likely, rather than controlled arrest, accelerated activation, or changes in metabolism.

• If a patient with anemia shows an elevated reticulocyte count despite continuously declining hemoglobin levels, which mechanism is most likely causing this paradoxical effect?
• Why does digoxin, a drug with a narrow therapeutic index, exhibit variable plasma concentrations between patients even when administered at the same weight-normalized dose?
• If a hiker ascends to high altitude, experiencing hypothermia despite wearing insulated clothing, which mechanism explains why core body temperature continues to drop despite maximal shivering?
• Following a deep skin wound that penetrates the dermis and disrupts collagen fibers, which effect dominates the long-term appearance of the healed area?
• Why does intense exercise cause muscle fatigue faster in fast-twitch muscle fibers compared to slow-twitch fibers?
• Why does accommodation lag significantly in older adults when switching focus from a distant object to a near object?