Investigate how heart rate changes with temperature, or under the influence of other chemicals that are physiologically active in mammals and other vertebrates. There are details here of a procedure for investigating living Daphnia, and also a detailed report of a study of a frog’s heart for discussion.
Control of heart rate
Experiment topics
Investigating factors affecting the heart rate of Daphnia
Observe Daphnia under a microscope and count its heart rate in different conditions – as temperature changes or as chemicals such as ethanol are added to the water.
View experimentThe vertebrate heart in action
Results from an investigation into the factors controlling the action of a frog’s heart are provided for discussion.
View experiment
