Q1. In a research laboratory, scientists want to record from single Cells in a culture dish. They want to record action potentials from single, isolated heart cells. What type of electrode would they need to use (express material and design)? Provide a simplified schematic (circuit model of the electrode) described in the notes.

Q2. Elucidate the importance of an arthropod's exoskeleton. In your explanation, be sure to address how is it able to grow tens of times larger than it was at birth, although it has an exoskeleton. Also discuss at least two benefits of an exoskeleton as well as how arthropod grows without compromising this skeletal system. The answer must be one or two well-developed paragraphs.