Feedback ( detection - correction ) Systems - November 19

what do these systems detect?

internal and external conditions

what do these systems do?

they evaluate and determine wether the conditions deviate from the norm

what happens if the system detects that the conditions deviate from the norm?

take corrective action to maintain homeostasis

what do the systems consist of?

1. sensor

2. integrator

3. effector

what is the sensor? what does it do?

a tissue or organ that detects a change in internal or external factors

what is the integrator? and what does it do?

a processing / control centre that compares environmental conditions with “set points” (optimal functioning conditions) and activates effector if conditions are outside of set points

what does the effector do?

returns measured condition to desired point ( action is called response)

what is the action of the effector called?

response

the sensor and integrator are apart of what systems?

the nervous or endocrine systems

who is part of the nervous or endocrine systems?

the sensor and integrator

the effector is what?

a tissue or organ

who is a tissue or organ?

the effector

what are the 2 types of feedback?

negative and positive

what is negative feedback?

a stimulus triggers a response that compensates for the change

use antagonistic effectors to produce the opposite effort of the change

example of negative feedback?

body temp

what is positive feedback?

a stimulus triggers a response that increases the change in the environmental condition

usually do not result in homeostasis (with some exceptions) since they cause the system to become unstable

how do positive feedback systems operate?

within a larger negative feedback mechanism

example of positive feedback?

child birth

how are the instructions for feedback systems transmitted in the body?

by nerves