Ch 1.4 Homeostasis Flashcards
1
Q
homeostasis
A
ability of an organism to maintain a constant internal environment even though there are changes in the external environment
2
Q
Sensor
A
- 1
- responds to stimulus away from normal condition
3
Q
set point
A
- 2
- the normal condition
4
Q
input signal
A
- 3
- how the change is communicated
5
Q
integrating/control center
A
- 4
- where input signal sends information
- usually nervous or endocrine systme
6
Q
efferent/control signal
A
- 5
- provides nerve impulses
- usually a gland or muscle
7
Q
effector
A
- 6
- anatomical structure that can provide a response to the change in stimuli
8
Q
Three basic components to a feedback system
A
- stimulus
- sensor
- control
- effector
9
Q
negative feedback loop
A
occurs when a change in a variable triggers a response that adjusts in the opposite direction of the initial change
10
Q
dynamic constancy
A
fluctuations constantly occur above and below a set point
11
Q
positive feedback loop
A
change causes the effectors to respond in the same direction as the change
