Insect: Which structure is used for sensing smells and air movement?

Insect: Which structure is used for sensing smells and air movement?

• A. Antennae
• B. Wings
• C. Mandibles
• D. Compound eye

Answer: (A)

Antennas are the primary sensory structures insects use to detect smells and changes in air movement. They’re covered with many sensilla that house chemoreceptors, which bind odor molecules and pheromones, transmitting signals to the nervous system to help locate food, mates, or navigate environments. They also contain mechanoreceptors that pick up airflow and vibrations, aiding orientation and detecting wind direction. Wings are for flight, mandibles are for feeding, and compound eyes handle vision, so antennae best fit smells and air movement.

Antennas are the primary sensory structures insects use to detect smells and changes in air movement. They’re covered with many sensilla that house chemoreceptors, which bind odor molecules and pheromones, transmitting signals to the nervous system to help locate food, mates, or navigate environments. They also contain mechanoreceptors that pick up airflow and vibrations, aiding orientation and detecting wind direction. Wings are for flight, mandibles are for feeding, and compound eyes handle vision, so antennae best fit smells and air movement.