Homeostasis

Homeostasis

Relative consistency of the body’s natural environment

Internal conditions stay within a narrow range

Dynamic equilibrium

Body conditions are not absolutely constant

Homeostasis mechanism components

Sensor, control center, and effector

Maintains homeostasis when environment changes body environment

Sensor

Detects changes in the body

Control center

Activates effector

Effector

Produces a response to change

Negative feedback

Primary homeostasis mechanism where the effector reverses the changes in body

Positive feedback

Effector continues to stimulate Sensor, which continues internal changes

Helps complete processes with a cutoff point, but can be harmful over time

What are 2 examples of positive feedback?

Blood clotting and childbirth

What body parts are necessary for maintaining homeostasis?

All of them!

Disease/illness

Imbalance in the body, homeostasis failure

Local disease

Disease in a specific part of the body

Systematic disease

Disease in several organ systems or the entire body

Acute disease

Sudden or short lasting disease

Chronic disease

Long term illness