Which consequence results when insufficient PTTH secretion affects larval insects?

💡 Explanation

Reduced PTTH secretion inhibits ecdysone production, because ecdysone is stimulated by PTTH, so molting inhibition occurs rather than progression. Without sufficient ecdysone, the insect can't trigger metamorphosis; therefore, larval growth stalls rather than accelerating metamorphosis or pupation.

• Which metabolic inefficiency arises when concurrent instead of countercurrent flow occurs in fish gills,?
• Which outcome occurs when mammals attempt hyperthermia recovery through peripheral vasodilation in high humidity?
• Which risk increases when reduced air sac pressure causes asynchronous breathing during thermal soaring?
• Which risk occurs when a tall tree's photosynthetic rate sharply rises, while soil moisture lags at near zero?
• Which evolutionary trade-off arises when insect imaginal discs require increased nutrient allocation?
• Which physiological effect occurs in a freshwater fish when the distal tubule in its kidney malfunctions?