Investigating the Effect of Alcohol on Heartbeat of Daphnia

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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

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