Lab One

Question 1

What is the iWorx 214?

Answer 1

A peripheral hardware device that collects physiological information as electrical [analog] signals, converts the signals into digital signals, and then sends the information to the computer for display and analysis.

Question 2

What LabScribe?

Answer 2

A program that displays and analysis’s the information from the iWorx 214. It controls the parameters associated with the input and output of the iWorx 214.

Question 3

What does the LabScribe y-axis represent?

Answer 3

The strength of the input signal data collected.

Question 4

What does the LabScribe x-axis represent?

Answer 4

Represents the time frame over which the signal is to be received [Display time]

Question 5

What to the vertical blue lines represent?

Answer 5

The current location of the two cursors.

Question 6

What is the function of this?

Answer 6

New file; opens a new file.

Question 7

What is the function of this?

Answer 7

Open file; opens a previously recorded file.

Question 8

What is the function of this?

Answer 8

Save file; save data to the file currently being open.

Question 9

What is the function of this?

Answer 9

Main Window; brings the main window to the foreground.

Question 10

What is the function of this? [Magnifying Glass]

Answer 10

Analysis Window; brings the analysis window to the foreground.

Question 11

What is the function of this?

Answer 11

XY View; brings the XY view window to the foreground.

Question 12

What is the function of this?

Answer 12

FFT (Spectrum); brings the FFT window to the foreground.

Question 13

What is the function of this?

Answer 13

Journal; opens the Journal in the right hand corner.

Question 14

What is the function of this?

Answer 14

Marks; brings the marks list to the foreground.

Question 15

What is the function of this?

Answer 15

Stimulator Preferences; hides or displays the Stimulator toolbar.

Question 16

What is the function of this?

Answer 16

Half Display Time; reduces the time displayed on the screen by a factor of 1/2 each time clicked.

Question 17

What is the function of this?

Answer 17

Zoom Between Cursors; zooms to the area selected by the two cursors.

Question 18

What is the function of this?

Answer 18

Double Display Time; increases the time displayed by a factor of 2 each time pressed.

Question 19

What is the function of this?

Answer 19

Double Cursor Mode; displays two cursors.

Question 20

What is the function of this?

Answer 20

Single Cursor Mode; displays one cursor.

Question 21

What does depolarization of the myocardial cells in the ventricle cause?

Answer 21

It causes the ventricles to contract and force blood into the major arteries of the ciculatory system in a pulsatile manner.

Question 22

What can the pulses of blood moving through the arteries be measured by?

Answer 22

Through a device called a *pethysmograph. *

Question 23

What is a skinfold measurement?

Answer 23

A measurement that provides a rough estimate of total body fat as it relates to the relative amount of subcutaneous adipose tissue found within the hypodermis. This is important in maintaining homeostasis because it helps retain heat by forming an insulating layer.

Question 24

Where do the peripheral thermoreceptors send signals?

Answer 24

To the hypothalamus, which in turn causes a physiological change that includes an alteration in blood flow.

Question 25

How can blood flow be altered?

Answer 25

By changing the diameter of the arteries. Vasocontriction causes artery size to decrease, vasodilation causes artery size to increase.

Question 26

What is the equation for the percent of pre-heat amplitude?

Answer 26

average heat amplitude/average preheat amplitude x 100