Chapter 39 Flashcards
Collagen fibers
Tough fibrous proteins that provide strength and resist stress
Columnar
Cells that are tall and narrow
Conformer
an organism that alters its internal environment to conform with the external environment
Cuboidal
Cells that are square or box shaped in appearance
Ectotherm
An organism that relies on external heat to warm the body and stimulate metabolism
Elastic fiber
Composed of elastin and return to original shape when stretched
Endotherm
An organism that generates body heat internally from metabolic reaction
Homeostasis
Maintaining an internal environment that fluctuates around an ideal condition such as maintaining body temperature.
Homostasis
Maintaining a constant, non varying set of conditions
Mucous membrane
An epithelium with specialized cell that secret mucous to prevent tissue from drying out
Negative feedback
Occurs when the response to a stressor is in the opposite direction of the stress
Positive feedback
Occurs when the response to a stressor is in the direction of the stress.
Pseudostartified
When cells appear to be present in multiple layers but they are not
Regulator
An animal that regulates its internal environment independent of the external environment
Reticular fibers
Thin, branched fibers of collagen and glycoprotein
