INSTRUCTIONS - Part 1

Highlight the answers in bold font.

Load  Interactive Physiology Nervous System CD-ROM disk into the computer .

Double Click on Interactive Physiology Nervous
(At any time you may click Help or Virtual Professor for additional explanations)

Click Anatomy Review and Read Page 1

Click to pg. 2 and read

Click Center Forward Arrow to pg. 3 and do Exercise

Give three communications functions of neurons: they can communicate with ...
_______________     _________________     ____________________

Click Forward to pg. 4 after doing Exercise

Click Forward to pg. 5 after doing Exercise

Click Forward to pg. 6 after doing Exercise

Name the three parts of the neuron in sequence of impulse reception, generation and transmission.

_______________ _______________ ________________

Click Forward to pg. 7 after doing Exercise

The space between the transmitting axon and the receiving dendrite or cell body is called a ___________   ___________.

Click Forward to pg. 8 after doing Exercise

Click Forward to pg. 9 after doing Exercise

The generation of the action potential starts at the ________ __________ and ends at the ________ __________.

Click Forward to pg.10 after doing Exercise

________cells produce _______sheaths.
 

Click Forward to pg.11 after doing Exercise

The gaps between sheath cells are called ________________.

Describe how an action potential moves down an axon or dendron
____________________________________________________________________________________________________________________

Click Forward to pg.12 after doing Exercise and listen to Summary

Axons can be up to ______long.

Click Forward

Click Arrow at Far Right to Return to Menu

Click Ion Channels

Click and Read to pg. 6

An electrical stimulus may open a __________(chemical, pressure, voltage regulated - choose one) channel which carries ______ions into the membrane. The resting voltage meter indicated ______mv when the Na+ and K+ channels are closed. During _____-polarization (de-, re-, hyper-, resting - choose one) the Na+ channels opened; the Na+ channels closed when the voltage reached _______mv. Repeat animation as necessary.

The K+ channel opened at _____mv and closed at _____mv. K+ went into or out of the neuron? _________

Click Forward to pg. 7 after doing Exercise

Ach causes _____channels (chemical, pressure, voltage regulated - choose one) to open; _____ and _____ions move into and out of the neuron, respectively. Ach in this case is an neuro-_________(exciter, inhibitor, stabilizer). _____-polarization (de-, re-, hyper-, resting - choose one) takes place. GABA opens ______channels that move -_______ions into the membrane. If this happened at resting voltage, the cell will _____-polarize (de-, re-, hyper-, resting - choose one).  In this case GABA is an neuro-_________(exciter, inhibitor, stabilizer).

Click Forward to pg. 8 after doing Exercise

Where are chemical-regulated channels located on a neuron?
___________ and ____________

Where are voltage regulated channels located?

___________ and ___________and _____________.

Click Forward to pg. 9, then 10, after doing Exercises

Click Arrow at Far Right to Return to Menu

Click Membrane Potential

Click Forward to pg. 3 and Do Exercise

Fill-in the ratios (lowest number set to one and divided into larger number) of the following ions inside and outside the neuron membrane.

Ion Inside Outside
Na+
K+
Cl-
 

Click to pg. 8 and Do Exercise
What is voltage? ____________________________________________________________________________________________________________________

Click to pg. 9, 10 and11, doing Exercises

Name two forces that drive Na+ into a neuron when Na+ channels are opened. _________________ and _______________________

Click to pg. 12, 13, 14, 15 after doing Exercises

The _________pump maintains resting potential.

Click to pg. 16 after doing Exercise listen to Summary

Click on Far Right Arrow to Return to Menu

Click on The Action Potential

Click to pg. 2, 3 and 4 after doing Exercises

An action potential is called a _______ of depolarization.

Click to pg. 5 after doing Exercise

____channels open to start depolarization.

Click to pg. 6 after doing Exercise

The threshold here is ______mv.

Click to pg. 7 after doing Exercise

Opening some voltage regulated Na+ channels causes _______ (more, less, the same - choose one) number of Na+ channels to open. This is called a __________ feedback.

Click to pg. 8. 9, 10, after doing Exercises

K+ channels are open during ______-polarization (de-, re-, hyper-, resting - choose one)

Click to pg. 11, 12, 13, 14, 15, 16 after doing Exercises

As the wave of depolarization  is  passing, the outside of the membrane is ____________ (negative, positive or neutral - choose one).

Click to pg. 17 after doing Exercise

A thicker (diameter) neuron process will conduct at a _________speed (faster, slower, or the same - choose one). A myelin sheath allows for processes to conduct at a _________speed (faster, slower, or the same - choose one) as compared to an unmyelinated axon or dendron. Unmyelinated processes are found in ________(color) matter and myelinated processes in ________-(color) matter.

Click to pg.18 and Summarize

Click on Far Right Arrow
 

Click Quit