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Student task
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Student task |
The work will be either collective if the device if shown, or in pair if there is enought device.
| In orange : abilities | In green, expected answers |
Realize an experiment report
* Objective of the experience (Ability : experience understanding)
Record, thanks to a CAEx device (Computer-Assisted Experimentation), heart noises with a stethoscope (regular practice during a doctor consultation ).
* Experimental device frame specifying the measured parameter. (electric, phonic, mecanic, others). (Ability : Use representative ways of experimental sciences : the frame)
Frame with the stethoscope positionned on the chest. Microphone connected with a hearing piece of the stetoscope. Switching of the microphone on the computer. Speakers switched on the computer.
* Calculus of the cardiac frequences at rest, during efforts then after 2 minutes of recovery, precising proportionnality calculus and units. (Ability : Exploit experimental data with mathematical tools)
Counting during ten seconds cardiac peaks or respiratory cycles.
Conversion into frequency -per minute (beats per minute or cycles per minute)-
Eart : number of beats for 10 s x 6 = cardiac frequency in beats per minute. |
Breathing : (60s. x number of cycles for 24 secondes )/ 24s.= respiratory frequency in cycles per minute. |
* Graphic realization on Excel (Microsoft software) of cardiac and respiratory frequencies evolution. (Ability B2i (ICT qualification): Exploit numerical data using adapted software)
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* Task summary : How do cardiac and respiratory frequencies move at rest, during effort and after recovery time (Ability . Realize a synthesis)
From cardiac and respiratory frequencies calculus, at rest, during effort and after recovery time, we can say that cardiac and respiratory frequencies increase (up to double or triple) during effort. These frequencies come back to the rest values after a recovery time of few minutes.
