A “flight or fight” response occurs when the body perceives a type of threat. The hormone known as adrenaline is released which
will affect a variety of body systems. Which system needs to increase its activity in order for the muscular system to respond to the perceived threat? A)Endocrine
B)Integumentary
C)Excretory
D)Digestive
Bacteria does not contain membrane boung organelles therefore are prokaryotic and I also know they are unicellular. and they are definitely not multicellular so the answer is : c