What challenges do investigators face when conducting a scientific inquiry? Scientific inquiry is not easy to implement because of several factors. One of the problems is taking into consideration all the (1) and deciding which ones to standardize. Another problem investigators face during experimentation lies in (2) the evidence.

Drag each tile to the correct box. the body monitors the levels of oxygen in the blood to regulate breathing. isabel is running in a marathon and is near the finish line. she feels out of breath. how will her nervous system work to generate a reaction? arrange the tiles in chronological order. isabel's breathing rate increases. sensory receptors in the arteries detect low oxygen levels. the brain sends signals through motor neurons. sensory neurons generate an impulse. the central nervous system relays an impulse to certain brain regions.