Coursework.Info - Inspiration in an Instant

On the left is an image preview of every page of this document, and below are the first 150 words with formatting removed:

THE HEART RATE OF DAPHNIA UNDER DIFFERENT CONDITIONS. Aim: To investigate the heart rate of daphnia under different conditions, such as drugs. Theory: There are different types of drugs. Some are depressants and some are stimulants. By depressants we mean that they slow down the rate of metabolism. Stimulants increase the body's metabolism. Heart rate is one indicator of increased or decreased metabolism. Drugs affect the heart rate of daphnia the same way as humans. Caffeine and nicotine are stimulants they will increase the heart rate of daphnia as well as humans. Ethanol, alcohol and aspirin are depressants and they will slow down the heart rate of daphnia. Because of different concentrations of alcohol we have to do a serial dilution. Example: If we have 10% of alcohol to start with and the final is 2%, then volume of water is 0.8 and alcohol is 0.2. So the dilution factor is...

Get instant access

• Instant, unlimited access to our documents in full
• Swap your work for free access, or pay £4.99
• To see the full version of this document and 145,970 others

OR

Receive email updates for this category

• Simply tell us your email address and receive a weekly Study Help Email for FREE
• Receive 3 FREE essay views with each email
• Get all the latest essays from Coursework.Info & discussion from TheStudentRoom.co.uk