Investigating the Effect of Alcohol on Heartbeat of Daphnia
Daphnia are the organisms that are involved in this experiment to find
out what effect alcohol has on their heartbeat. It is easy to study
the effects of alcohol on the heart of Daphnia as the organ can be
easily seen through the transparent body of Daphnia. The number of
heartbeats may be counted before submersion in alcohol and after
submersion in alcohol to investigate the effect of alcohol.
Daphnia belong to the Phylum Arthropoda and are Branchiopoda which
belong to the class, Crustacea. Daphnia are invertebrates and also
have an exoskeleton, jointed appendages, a dorsal heart and open blood
system.
The effect of alcohol on humans is that it slows down the heartbeat,
so it may be that alcohol will have the same effect on Daphnia. WHY???
However, it is possible that the heartbeat of Daphnia may not decrease
if submerged in alcohol. This is because Daphnia differ to humans in
many ways firstly Daphnia are invertebrates whereas humans are
vertebrates. Also, like most crustaceans Daphnia live in an aquatic
environment and so it could be possible that the heart of Daphnia may
be adapted differently to respond to ethanol.
Alcohol effects the transmission of the nerve pulses along neurones to
produce the affect that it does so on the heartbeat of Daphnia.
Alcohol interferes with the nervous system by slowing down the nerve
impulses that are sent down neurones from the brain. Alcohol does this
by binding with the receptor sites where normally certain
neurotransmitters may only bind with the receptor sites in the
membrane. This means that the nerve impulses consequentl...
... middle of paper ...
... out a further investigation into the effect of
alcohol on the heartbeat of Daphnia I would want to determine where
exactly in the body of the Daphnia the alcohol affects. To find out if
the alcohol has a direct effect on the heart or if it affects the
nervous system I would dissect the heart from several Daphnia and
submerge only the heart in alcohol.
In future experiments it would also be interesting to find out the
effect of caffeine on the heart rate of the Daphnia and whether it
produces similar results to the experiment using alcohol or not. It
would also be interesting
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CONTENTS PAGE
Content Page
Abstract
Introduction
Method
Results
Conclusion & Discussions
Evaluation- Variability Analysis
- Limitations & Errors
is translucent and I will be able to see its heart beating. I will do
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minutes, the AHR escalated even more, to 369 bpm. See Table 5 and Figure 3.
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