When the concentration of glucose in the blood falls below a certain level, the body issues a signal to allow stored glucose to enter the blood. After a short time, the body has established a normal concentration of glucose. Which process does this action illustrate?
A Homeostasis
B. Synthesis
c. Metamorphosis
D. Respiration

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