Download Skin Sensitivity Lab

Part A: Sensitivity – Applying different amounts of
stimulus to different areas of the body – Is it felt or not?
Part B: Discrimination – Applying stimulus to different
areas of the body – What do you feel?
Work in Pairs to Complete the lab. Record the responses for your
Partner on the data table given to you. Return all materials to your teacher
When done. Pick up the post lab questions and complete.
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Where is the concentration of Na+ ions greater?
Where is the concentration of K+ ions greater?
The green structure represents a sodium and
potassium pump protein. In which direction are
the two ions being pumped? Why?
Video on How the
Sodium-Potassium
Pump Works
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Form of active transport
Used to maintain the resting
membrane potential of a cell
in animals
Needed because the gain of
Na+ and loss of K+ by cell
is not equal so the positively
charged outside of
membrane & negatively
charged inside would be lost
Used to recover after neuron has
been stimulated…
Voltage Gated Channels