Introduction Part 2 Flashcards
What are the 2 main control systems in the body?
Automatic and NonAutomatic control systems.
Automatic Control system is subdivided into;
- Feedback Control System
2.Feedforward Control System
Feedback Control system is further divided into;
Negative feedback and Positive feedback
NonAutomatic system is …….
Relatively rare
What is a closed loop system and maintains homeostasis
Feedback Control System
What is the Concept of Negative feedback?
A change in the variable being regulated brings about responses that tend to push the variable in the direction opposite the original change.
What does Negative Feedback minimize?
It minimizes changes from the set point of the system leading to stability
What is a set point?
The steady state value for any variable that the body attempts to maintain
What displaces a variable from it’s prexisting set point?
Pertubations in the external environment
Set points can be physiologically…..
Altered or reset
Resetting of set points is…..
Adaptive to the body’s defense against diseases.
Set points change on a?
Rhythmical basis
Concept of positive feedback?
A change in the variable being regulated brings about responses that tend to push the variable in the direction similar to the original change.
# IT ACCELERATES A PROCESS LEADING TO AN “Explosive “ SYSTEM.
Importance of feed forward regulation
improves the speed of the body’s homeostatic responses, and reduces the amount of deviation
from the set point
•What does Feed forward regulation utilize? •Feed forward regulation can be a result of?
•utilizes a set of external or internal environmental detectors.
• can be the result of learning.
Homeostatic control systems minimize?
changes in the internal
environment but cannot maintain complete constancy
What is Adaptation?
Adaptation denotes a characteristic that favors survival in
specific environments.
What is Acclimatization?
Acclimatization is an improved ability to respond to an
environmental stress.
Are homeostatic control systems adaptations?
They are inherited biological adaptations
What are the sources of net gain?
food (GI) & air (lungs) & synthesis •
Causes of net loss are?
excretion from body via lungs, GI
tract, kidneys, skin, menstrual flow & metabolism
What does total body balance depend on?
Net gain and Net loss
Characteristics of feed forward regulatory processes
•Work in anticipation of changes in regulated variables.
•Work in conjunction with negative feedback processes
When a person is exposed to an environmental stress for a prolonged period of time, the person’s ability to adapt to that stress is enhanced. This is an example of?
Physiological Acclimatization
