Control and Coordination

Question 1

Homeostasis

Answer 1

the maintenance of a relatively constant internal physiological environment of the body or part of the body (e.g. blood glucose level, pH, body temperature) in varying external conditions

Question 2

Stimulus–response model

Answer 2

a system in which any changes or variations (stimuli) in the internal environment are detected (by receptors); if a response is required, this is communicated to effectors to bring about some type of change or correction so the conditions can be brought back to normal

Question 3

Multicellular organism

Answer 3

an organism that is composed of many cells. Most plants and animals are multicellular.