TERM 1
Definitions (homeostasis)
DEFINITION 1
Homeostasis is the process of maintaining a constantinternal
environment inthe body.
TERM 2
Coordinating systems
DEFINITION 2
The two main coordinating systems i n the human body are the
nervous and endocrine systems. The nervous system is
responsible for coordinating all of the b ody's activities. It controls
not only the maintenance of norma l functions but also the body's
ability to cope with emergency situa tions. The endocrine system is
the body system of glands that produc e and secrete hormones
into the bloodstream in order to regu late processes in various
organs.
TERM 3
Tolerance range
DEFINITION 3
Organisms have an optimum level (id eal range) for internal
conditions E.g. temperature, water, s ugar of the blood, etc. If the
internal is outside this optimal range, b ut the organism can still
survive, it is called the tolerance ran ge. The tolerance range and
the optimum level are set through t he process of
homeostasis.Homeostas is is the process of maintaining a
constantinternal environment inthe body.
TERM 4
Name Stimulus and
Response
DEFINITION 4
A stimulus is a change in the environment of an organism.
After detecting astimulus, organisms must provide
aresponsein order to account for the change. A tropism is
aresponsethat an organism makes to a stimulus.
TERM 5
Negative Feedback Loop
DEFINITION 5
Negative feedbackis a reaction that causes a decrease in
function. It occurs in response to some kind of stimulus.
Often it causes the output of asystemto be lessened; so,
thefeedbacktends to balance thesystem.
