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Exam (elaborations)

Biol 482 Lab Exam 1 (96 questions) NEWEST with precise detailed solutions

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Biol 482 Lab Exam 1 (96 questions) NEWEST with precise detailed solutions

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BIO 482
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Institution
BIO 482
Course
BIO 482

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Uploaded on
April 26, 2025
Number of pages
19
Written in
2024/2025
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Exam (elaborations)
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Biol 482 Lab Exam 1
with precise detailed
solutions
Data Acquisition in a PowerLab System - correct answer ✔Mechanical Signal (of interest) →
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




TRANSDUCER ||||||




Analog/Voltage Signal → POWERLAB HARDWARE |||||| |||||| |||||| ||||||




Digital Signal →- COMPUTER |||||| |||||| ||||||




Transducers in Lab - correct answer ✔-Pulse Transducer |||||| |||||| |||||| |||||| |||||| |||||| ||||||




-Electrode Transducer (cockroach lab) |||||| |||||| ||||||




-Flow-head Transducer (for volume inspired/expired) |||||| |||||| |||||| ||||||




-Gas Analyzer ||||||




-O2 Transducer (visible-spectrum)
|||||| ||||||




-CO2 Transducer (infrared) |||||| ||||||




-ECG Transducer ||||||




Powerlab Hardware - correct answer ✔measures changes in signal (blood pressure) only if a
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




suitable transducer converts pressure into an analog signal, then to a digital signal by signal
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




conditioning.
||||||




-> monitors changes in analog voltages
|||||| |||||| |||||| |||||| ||||||

,-> completes signal conditioning
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-> samples voltage at regular intervals and converts to digital signal
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Transducer - correct answer ✔converts signal of interest (bp, body temp) into analog |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




voltage


Signal Conditioning - correct answer ✔-done by the hardware
|||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




- modifies the voltage recordings by amplification, filtering, zeroing (taking out unnecessary
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




data/noise), sampling ||||||




PowerLab 26T - correct answer ✔-teaching laboratory hardware |||||| |||||| |||||| |||||| |||||| |||||| ||||||




-four-channel recording ||||||




-Bio-amplifiers
-built-in Isolated Stimulator |||||| |||||| ||||||




-controlled by software |||||| ||||||




Bio-amplifiers - correct answer ✔-built-in front-ends on the Powerlab 26T |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




-allow optimal recording of biological signals
|||||| |||||| |||||| |||||| ||||||




LabTutor software - correct answer ✔-software for lab teaching |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




-displays sampled and digitized data points (reconstructs original waveform by adding lines
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




between points) ||||||




-allows manipulation and analyzing of data in a variety of ways
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Name two physiological variables, other than finger pulse, that you could measure with
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




PowerLab and LabTutor. - correct answer ✔Body temperature and blood oxygen level
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Parts of the PowerLab - correct answer ✔- A shows the pod ports that are the connections
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




for the transducers while also providing power for these transducers.
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||

, - B shows the Dual Bio amp port that can connect a bio amp used for recording of stimuli.
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




- C shows the Isolated Stimulator outputs that make it safe to take and record data directly
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




from humans without the need of a transducer and sends out electrical impulses
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Describe what is actually being recorded by PowerLab and displayed in LabTutor. - correct |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




answer ✔-Recording pulse amplitude versus time |||||| |||||| |||||| |||||| ||||||




-Amplitude of pulse indicates strength of contraction, and frequency of peaks can be used |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




to determine pulse rate.
|||||| |||||| ||||||




When heart contracts, there is pressure in the ventricle, which is released when heart
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




relaxes. ||||||




-Contracted=peak, relaxed=trough ||||||




-The pressure can be detected in the fingertips
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




Describe what is actually being recorded by the PowerLab and displayed in LabTutor. - |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




correct answer ✔-Recording pulse amplitude versus time |||||| |||||| |||||| |||||| |||||| ||||||




-Amplitude indicates strength of a single heartbeat, and the frequency of the peaks can be |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




used to determine heart rate. |||||| |||||| |||||| |||||| ||||||




-When heart ontrac |||||| ||||||




Were all of your measurements identical for every member of your group? Would you
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




expect them to be identical? - correct answer ✔No. They were relatively similar because the
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




graphs resembled each other, but the amplitude of the pulses and the time in between
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




were different. Age, gender, body size, genetics, activity levels, heart conditions, application
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




of the transducers, calibration, and many other factors can affect the pulse from person to
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




person.


Can you think of some other parameters that LabTutor could calculate based on your
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




original pulse trace? - correct answer ✔Heart rate (BPM), strength of pulses, stroke volume,
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




cardiac output. ||||||




Why is it important that the data in all channels be deleted simultaneously? - correct
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




answer ✔It is important because if data was deleted in one channel and not the other ones
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||

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