Pathogens, like disease causing viruses, can enter the body through the blood stream. Phagocytic white blood cells will respond by releasing enzymes and by ingesting the pathogens to destroy them. What transport process is used by these white blood cells to ingest the virus? A) facilitated diffusion

B) sodium-potassium pump

C) exocytosis

D) endocytosis

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit