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Hi, I'm Dr. Angelina Fong,
senior lecturer from
the Department of
Anatomy and Physiology
at the University of
Melbourne in Australia.
In this recording,
we're going to cover
simple circuits as part of
the fundamentals of
human physiology.
You might be wondering
what the circuits have
to do with physiology.
Let's find out.
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Imagine that every
action that you do,
whether consciously
or subconsciously,
requires a circuit that
takes the initiation or
the sort and translates
it into the final output.
Whether you're
going for a run or
speaking or simply
just swallowing,
all of these actions
that your body
performs requires a circuit.
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We need to have an initiator or
trigger that will lead to
an action or an effect.
For this to happen, we must
have an output part of
the circuit that takes
the information from the
trigger to the action.
Once we produce the
action or the effect,
there are often feedback
mechanisms that will cause
a reflex response to
the initiator or the trigger
to change what that
trigger might be.
There are names of these
different parts of the circuit,
called efferent for
the output part
and afferent for the input part.
These are terms that we'll
come back to in the future,
but I just want to show you
what these circuits
might look like.
Now, this is a very
simple loop circuit.
But what is involved
in these circuits?
