A & P Chapter 1:4 Homeostasis

Front 1

Homeostasis

Back 1

the exsistance & maintenance of a relatively constant enviornment within the body

Front 2

variables

Back 2

body conditions that change over time; a condition such as temperature that can change.

Front 3

set point

Back 3

the normal value for a body condition

Front 4

Normal Range

Back 4

SLight increases and decreases of a variable around the set point

Front 5

Homeostasis is the maintenance of a ____ around an ideal _____ or ______ to establish a normal range of values.

Back 5

variable
normal value
set point

Front 6

Negative Feedback

Back 6

Is a mechanism used by the body to regulate most systems. Negative means that any deviation from the set point is made smaller or resisted.

Front 7

What are the three components of negative feedback

Back 7

receptor
control center
effector

Front 8

what is the job of the receptor?

Back 8

to monitor the values of some variable such as blood pressure

Front 9

what is the job of the control center?

Back 9

to establish a set point around which the variable is maintained

Front 10

what is the job of the effector?

Back 10

to change the value of a variable

Front 11

A deviation from the set point is called _______?

Back 11

stimulus

Front 12

Explain how negative feedback works

Back 12

The receptor detects the stimulus and informs the control center, which analyzes the input from the receptor. The control center sends output to the effector, and the effector produces a response, which tends to return the variable back toward the set point.

Front 13

study

Back 13

study the diagram

Front 14

study

Back 14

study the diagram

Front 15

Stimulus

Back 15

a deviation from a set point

Front 16

Give an example of good positive feedback

Back 16

childbirth