Phospholipids are molecules that have A. one nonpolar phosphate head and two polar fatty acid tails.

B. one polar phosphate head and one polar fatty acid tail.

C. one polar phosphate head and two polar fatty acid tails.

D. one polar phosphate head and two nonpolar fatty acid tails.

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.