Stimulating Daphnia

The video tutorial explores how temperature and chemicals affect the heart rate of Daphnia, a small freshwater crustacean. The experiment involves measuring heart rates under different conditions: room temperature, ice water, warm water, ethanol, and tea. Results show that cold temperatures and ethanol slow the heart rate, while warm temperatures and tea increase it. These findings have medical applications, such as in heart surgery, where cooling the heart reduces oxygen needs.

Describe the process of returning Daphnia to the container after measuring their heart rate.

What role does caffeine play in the heart rate of Daphnia when exposed to weak tea?

What is the significance of understanding how temperature affects heart rate in medical procedures?