Homeostasis

Question 1

What is homeostasis?

Answer 1

The ability of an organism to to maintain a consistent internal environment in response to changing internal/external conditions

Question 2

3 components of homeostasis

Answer 2

Receptor, control center, effector

Question 3

Variable

Answer 3

Anything that is regulated

Question 4

Receptor

Answer 4

Constantly monitors a variable

Question 5

Control center

Answer 5

Interprets info from receptor; decides the change needed, then tells the effector

Question 6

Effector

Answer 6

Actually makes the change

Question 7

Set point

Answer 7

The ideal perfect value for a variable

Question 8

Normal range

Answer 8

slight variation of the set point, but not considered abnormal

Question 9

Negative feedback

Answer 9

The action is in the opposite direction of stimulus; brings body back to its set point

Question 10

When will negative feedback stop?

Answer 10

Once the variable is back within normal range

Question 11

Positive feedback

Answer 11

The action furthers change in the same direction of stimulus; brings body farther from its set point

Question 12

When will positive feedback stop?

Answer 12

When the stimulus is removed

Question 13

Stimulus

Answer 13

Change in the variable (a physical or chemical factor)

Question 14

Characteristics of homeostasis (associated with health and disease)

Answer 14

1. They are dynamic
2. Control system is generally the nervous or endocrine system
3. 3 components (receptor, control center, effector)
4. Typically regulated thru negative feedback to maintain a normal value or set point
5. When systems fail, homeostatic imbalance or disease may result and could threaten survival