When a human's blood pressure increases,
signals are sent from
the blood vessels to
the brain. Then, the
brain sends a message
to the heart, telling
the heart rate to slow
down.

Is this an example of
positive or negative
feedback? How do you
know? Explain how the
situation could be the
opposite (for instance,
if you said that the
example above is
positive feedback, then
explain a scenario
where it could be
negative feedback).

what experimental evidence led scientists to change from the previous model to this one?

a few of the positive particles aimed at a gold foil seemed to bounce back.

the colors of light emitted from heated atoms had very specific energies.

experiments with water vapor showed that elements combine in specific proportions.

cathode rays were bent in the same way whenever a magnet was brought near them.

because growing process had stoped after 4-5 year

high-sugar diet and high cholesterol