My hypothesis for a lab report was that tabacco and coffee both increase the heart rate but the results show that they both decrease the heart rate. How can this be explained? Why do most facts explain that they increase the rate? PLZ HELP THX!
2007-03-28 15:43:47 · 6 answers · asked by aya.face 1 in Science & Mathematics ➔ Biology
you have to look at your experiment more closely.
there are many many other things theat increase or
decrease heart rate...whether you are talking, standing up or sitting down, what you are seeing, what you are thinking about, digestive processes etc. maybe you have overlooked some factor that is overshadowing the heart rate increase effect if coffee and tobacco
2007-03-28 15:48:25 · answer #1 · answered by BonesofaTeacher 7 · 0⤊ 0⤋
You got me, I don't know. My first thought is that it has to increase the heart rate since both tobacco and caffeine are stimulants. Are you sure the test was right? Maybe someone used de-caf coffee? Did you check b/p before a person smoked and then afterwood? I give up. Good luck.
2007-03-28 15:55:12 · answer #2 · answered by phylobri 4 · 0⤊ 0⤋
Both nicotine and caffeine are stimulants. They will both, therefore, INCREASE heart rate.
2007-03-28 15:51:25 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Are you sure that your results are accurate? Could your measurements have been skewed by other variables? If you're getting such erroneous results, I would consider such possibilities.
2007-03-28 15:52:55 · answer #4 · answered by Terras 5 · 0⤊ 0⤋
increase
2007-03-28 15:48:57 · answer #5 · answered by crengle60 5 · 0⤊ 0⤋
increase. both are stimulates
2007-03-28 15:49:51 · answer #6 · answered by DOUGLAS P 2 · 0⤊ 0⤋