Exam (elaborations)
HTHSCI 1H06A: Homeostasis Questions and Answers
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HTHSCI 1H06A: Homeostasis Questions and Answers
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1-17 of 17Which feedback system manages temperature regulation when you are too hot?
Negative feedback
-Dilation of blood vessels to radiate heat to skin to be released in the form
of sweat
, Which feedback system manages temperature regulation when you are too cold?
Negative feedback
-conserving heat (constricting cutaneous blood vessels)
-producing heat (release of adrenalin and thyroid hormone, contraction of
skeletal muscle to shiver)
What is the main difference between positive feedback and negative feedback
mechanisms?
In POSITIVE feedback: the effector moves the variable FURTHER from the
starting point to provide MORE stimulus to EXAGGERATE the change in
the variable
Why are positive feedback mechanisms always found within other negative feedback
mechanisms?
Because the positive feedback loop must terminate with some distinct
event (E.G. birth ends contractions)
What are examples of external and internal factors that can affect homeostasis?
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