Homeostasis lesson 1

Question 1

Give an example of what homeostasis maintains.

Answer 1

constant supply of O2 and glucose
constant body temperature
optimal levels of CO2, H2O and salt

Question 2

For homeostasis to work

Answer 2

1) sense changes in the external environment
2) Respond appropriately to maintain an internal balance.

Question 3

What are the advantages and disadvantages of the nervous system

Answer 3

Advantage:
Very quick reaction

Disadvantage:
-Can’t keep up a persistent command (not good for sustained stimuli
-Not connected to all cells

Question 4

What are the advantages and disadvantages of the endocrine system

Answer 4

Advantage:
-Hormones can go everywhere
-can set up persistent response

DIsatvantage:
-Slower reaction.

Question 5

What are the subtopics for the feedback loop

Answer 5

Feedback
Response
Effector
Integrator
Receptor
Stimulus.

Question 6

What is negative feedback

Answer 6

Reduces effects of the stimulus

Question 7

What is positive feedback

Answer 7

Works to increase the effects of the stimulus/change.

Question 8

List the subtopics of feedback loop

Answer 8

-Stimulus (stress/change)
-Receptor (detects stimulus)
-Integrator (Control centre)
-Effector (Alters condition)
-Response (weaken stimulus)
-Feedback