Exam 1: Lab 1 Homeostasis and Negative Feedback System Flashcards
a healthy individual maintains…
homeostasis - a relatively constant internal environment
Homeostasis is maintained by
cells, tissues, and organs that operate together as negative feedback system
the negative feedback systems in the human body are parts of the
nervous and endocrine system
a graph of a controlled variable shows
the variable fluctuating around a set point
external factors does what
stress the system and cause the variable to increase or decrease
a normally functioning negative feedback system does what
detects the change and causes a response that moves the variable back toward the set point
much of medical diagnosis is based on
tests that measure controlled variables
what happens if any of these variable are outside normal range
a particular illness can be diagnosed
inherited and environmental differences among individuals result in
variation in physiological measurements
normal range of values
a range of measurement that includes most healthy people
values outside the range
may be the result of illness or injury causing a loss of homeostasis
measurements of an individual will nvary over the course of time…fluctuations are usually result of
externa factors
negative feedback responses are
within normal range of values
a flow diagram is a useful way of
organizing the information about a negative feedback system
flow diagram can be used to
predict how external factors or damage to parts of the system will change the controlled variable
