13) groups of skin cells form the epithelium, which lines organs and cavities in the body. the epithelium is most likely a kind ofa)cell.
b.organ.
c.tissue.
d.organ system.14) in humans, these organs are part of a larger system, the ________ system.
a.circulatoryb)digestivec)nervousd)reproductive15) the human body organ known as the pancreas secretes the hormones insulin and glucagon. these hormones regulate the level of glucose in the bloodstream. if the level of glucose is too low, the pancreas secretes glucagon which causes the glucose level to increase; if the glucose level is too high, the hormone insulin will lower the glucose level. what name is given to this type of regulatory system?
a.endocytosisb)homeostasisc)meiosisd)symbiosis