Homeostasis and feedback loops

Question 1

What does the body have to monitor at all times?

Answer 1

Internal conditions

Question 2

Set points

Answer 2

Specific values for various physiological conditions that the body tries to maintain
ex. Body temperature
Set point- 98.6

Question 3

Homeostasis

Answer 3

The state of relatively stable internal conditions
-Organisms detect and repsond to a stimulus
-Balance
-Maintains homeostasis through feedback loops

Question 4

Two types of feedback loops

Answer 4

1. Negative
2. Positive

Question 5

Stimulus

Answer 5

A variable that will cause a response

Question 6

Receptor/sensor

Answer 6

sensory organs that detect a stimulus. Information sent to the control center (brain)

Question 7

Effector

Answer 7

Muscle or gland that will respond

Question 8

Response

Answer 8

Increases or decreases the effect of the stimulus

Question 9

Negative feedback loop

Answer 9

-REDUCES the effect of the stimulus

Question 10

cold and body temp regulation example

Answer 10

Stimulus: cold
Receptor: Temperature receptors in skin
Effector: muscles
Response: Shivering

Question 11

Positive feedback loop

Answer 11

-INCREASES the effect of the stimulus
ex. fruit ripening

Question 12

Homeostasis imbalances can be caused by

Answer 12

-Cancer
-Diabetes
-Genetic disorders
-Intolerable conditions
-Drug or alcohol abuse

Question 13

Cell signaling and homeostasis

Answer 13

-To maintain homeostasis cells in a multicellular organism must be able to communicate
-Communications occurs through signal transduction levels