Welcome to the Quiz!
This quiz contains 9 questions from a mix of 1 subtopics.
What maintains stable internal conditions in the body despite changes in the external environment?
negative feedback
equilibrium
positive feedback
homeostasis
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What detects stimuli and signals the brain about changes in the internal environment?
effectors
organisms
coordinators
receptors
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Muscles or glands that act on signals from the brain to elicit responses are known as:
receptors
coordinators
stimuli
effectors
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Negative feedback systems work to maintain conditions around:
minimum points
midpoints
maximum points
set optimum points
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How does negative feedback reverse changes in the internal environment?
by detecting changes and producing responses in the opposite direction
by signalling between adjacent cells only
by intensifying changes until equilibrium is disrupted
by maintaining external conditions
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Which of the following is NOT an example of negative feedback?
temperature regulation
glucose regulation
maintaining blood pH
blood clotting
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Positive feedback differs from negative feedback in that it:
reverses changes
amplifies changes
maintains equilibrium
occurs between adjacent cells only
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Why is tight regulation essential for positive feedback systems?
to maintain external equilibrium
to enable communication between close cells
to reverse changes completely
to prevent uncontrolled responses disrupting the body
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Negative feedback and positive feedback differ in that:
negative feedback enhances changes while positive feedback reverses them
positive feedback relies on cell signalling but negative feedback does not
positive feedback is involved in homeostasis but negative feedback is not
negative feedback restores equilibrium while positive feedback intensifies change
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