Question

♠Effect of caffeine on the heart rate of Daphnia♠
(Experiment 1)
(Easy 9 points)

Answer 1

☻ The following experiment is described in the easiest and simple words so that you all can easily understand☻

Daphnia are tiny aquatic invertebrates.They're transparent, so you can see their internal organs. This means it's pretty easy to monitor their heart rate by observing them through a microscope.

Answer 2

♠Here's how you could investigate the effect of caffeine on their heart rate♠

1) Make up a range of caffeine solutions of different concentrations and a control solution that has no caffeine in it all♣
2) Transfer one Daphnia into the dimple on a cavity slide ( A MICROSCOPE SLIDE WITH A ROUNDED DIP) ♣
3) Place a slide onto a stage of a light microscope and focus it on the beating heart of the Daphnia ♣
4) Place a small drop of caffeine solution onto the Daphnia
5) Count the number of heartbeats in 10 seconds and multiply this by six to calculate beats per minute ♣
6) Repeat this 10 times using the same concentrations of caffeine but a different Daphnia individual each time .
7) DON'T FORGET to keep all other factors constant (e:g Temperature and Volume of caffeine solutions ) ♣
8) Repeat the experiment using the other concentrations of caffeine solutions
9) Compare the results to see how caffeine concentrations affect heart rate e:g BY DRAWING A GRAPH ♣

Answer 3

☻Thank you for reading☻

Answer 4

good experimentation...if u done it by ur own thn bravo

Answer 5

Thank you ☻

Answer 6

what is the conclusion of ths exp besides its statistics?

Answer 7

Heart rate increase as Caffeine concentrations increase :)

Answer 8

that's why increased amount of caffeine is not good for health as it increased the heart rate not only in daphnia but in all the multi cellular organisms as well, Thus increasing the risk of getting CVD'S

Answer 9

increases**

Answer 10

great conclusion :)

Answer 11

Thanks :D

Answer 12

Good work :)

Answer 13

Thanks ☻☺

Answer 14

Nice :-)

Answer 15

thnx :)

Answer 16

the experiment shows the effects of caffeine to heart rate relative to concentration
it does not show anything about CVD

Answer 17

you can, however, do an experiment to measure average threshold when certain high levels of caffeine may induce myocardial infarction

Answer 18

okay....thanks :)

Answer 19

maybe i shouldn't drink straight espresso then lel

Answer 20

LoL. :D

Answer 21

i'll show you a simple daphnia experiment

Answer 22

thank you nin :)