Unit 5: Homeostasis & Health (Immune System
& Response) Questions and Answers
Behavioral Response - ✅✅The actions & interactions of the individual, either alone or with others,
that help the organism survive in its environment. (migration, huddling together - penguins)
Pathogen - ✅✅An organism that causes disease or any disease causing agent.
Equilibrium - ✅✅A state of balance.
Homeostasis - ✅✅A tendency to maintain a balanced or constant internal state; the regulation of any
aspect of body chemistry, such as blood glucose, around a particular level.
Hormone - ✅✅A chemical that serves as a messenger. Each one is secreted by a gland and travels to
one or more target organs, where it brings about responses.
Neuron - ✅✅A nerve cell; the basic building block of the nervous system.
Physiological Response - ✅✅Body's response to an environmental change as a means by which to
return/maintain the internal environment to a state of equilibrium.
Negative - ✅✅A type of regulation or feedback that responds to a change in conditions by initiating
responses that will counteract the change. Maintains a steady state.
Positive - ✅✅A type of regulation or feedback that responds to a change in conditions by initiating
responses that will amplify the change. Takes organism away from a steady state.
Vasodilation - ✅✅A widening of the diameter of a blood vessel - assists in cooling of the body.
& Response) Questions and Answers
Behavioral Response - ✅✅The actions & interactions of the individual, either alone or with others,
that help the organism survive in its environment. (migration, huddling together - penguins)
Pathogen - ✅✅An organism that causes disease or any disease causing agent.
Equilibrium - ✅✅A state of balance.
Homeostasis - ✅✅A tendency to maintain a balanced or constant internal state; the regulation of any
aspect of body chemistry, such as blood glucose, around a particular level.
Hormone - ✅✅A chemical that serves as a messenger. Each one is secreted by a gland and travels to
one or more target organs, where it brings about responses.
Neuron - ✅✅A nerve cell; the basic building block of the nervous system.
Physiological Response - ✅✅Body's response to an environmental change as a means by which to
return/maintain the internal environment to a state of equilibrium.
Negative - ✅✅A type of regulation or feedback that responds to a change in conditions by initiating
responses that will counteract the change. Maintains a steady state.
Positive - ✅✅A type of regulation or feedback that responds to a change in conditions by initiating
responses that will amplify the change. Takes organism away from a steady state.
Vasodilation - ✅✅A widening of the diameter of a blood vessel - assists in cooling of the body.
