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