What is the evaporation of a liquid to cool the body?
Shivering
Sweating
Vasodilation
Vasoconstriction
2. Multiple Choice
2 minutes
5 pts
Homeostasis in the human body is often maintained by a:
neutral feedback loop
solar feedback loop
positive feedback loop
negative feedback loop
3. Multiple Choice
3 minutes
5 pts
When you are cold, you shiver and your blood vessels contract, which warms you up. When you are hot, you sweat and your blood vessels expand, which cools you down.
Positive Feedback Response
Negative Feedback Loop
4. Multiple Choice
2 minutes
5 pts
Positive feedback is when the change caused by the stimulus is
decreased
non existant
increased
changes constantly
5. Multiple Choice
2 minutes
5 pts
Homeostasis
allows for a wildly fluctuating internal environment
is impossible in vertebrates
is the maintenance of a relatively stable internal environment and often incorporates a form of feedback regulation
is the maintenance of a relatively stable external environment and often incorporates a form of feedback regulation
6. Multiple Choice
1 minute
5 pts
If the environment gets cold, we will often shiver in order to:
keep body temperature the same as the external temperature
decrease body temperature
increase body temperature
regulate blood pressure
7. Multiple Choice
30 seconds
5 pts
A student walks into a cold room.
Which of the following happens to his body?
Sweating and vasodilation of blood vessels.
Shivering and vasoconstriction of blood vessels
Sweating and vasoconstriction of blood vessels.
Shivering and vasodilation of blood vessels.
8. Multiple Choice
30 seconds
5 pts
Diagram shows the cross section of human skin.
Which of the following will occur when the surrounding temperature drops below 10 ° C?
R constrict
Q relax
P erect
S become active
9. Multiple Choice
30 seconds
5 pts
Which body system controls the body to maintain homeostasis?
excretory
nervous
circulatory
skeletal
10. Multiple Choice
30 seconds
5 pts
Homeostasis is a ________ of an internal environment in organisms body to be in ________ and balance condition.
repair , stable
maintenance , stable
repair , higher
maintenance , higher
11. Multiple Choice
30 seconds
5 pts
Which organ acts as a control centre of a homeostasis process?
12. Multiple Choice
30 seconds
5 pts
These are corrective mechanisms when ...
Water level Increases
Water level Decreases
Body temperature increases
Body temperature decreases
13. Multiple Choice
30 seconds
5 pts
Choose Corrective mechanisms when body temperature increases
Hair lies flat
Hair stands erect
Blood vessel dilates
Blood vessel constricts
More sweats is produced
14. Multiple Choice
30 seconds
5 pts
Choose corrective mechanisms when body temperature decreases
Hair Lies flat , blood vessel dilates
Hair stands erect , blood vessel constricts
Skeletal muscles move passively
Skeletal muscle move actively - shivering
decrease sweating
15. Multiple Choice
30 seconds
5 pts
Why our hair will stands erect during cold days?
To increase body metabolism
To trap air which acts as heat insulator
To let more blood flows near skin surface
To cool down skin when sweats is evaporated
16. Multiple Choice
30 seconds
5 pts
the reason for all these corrective mechanisms during homeostasis is to ..
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