SUMMARY
The discussion focuses on calculating the current flowing through a cell membrane given its thickness, resistivity, and potential difference. The cell membrane is 8.0 nm thick with a resistivity of 1.3 x 107 Ω·m, and the potential difference is 75 mV. To find the current, the resistance is calculated using the formula R = ρ(L/A), where L is the thickness of the membrane and A is the area of the membrane (1.3 µm on a side). The correct application of these formulas leads to the determination of the current flowing through the membrane.
PREREQUISITES
- Understanding of electrical resistivity and its units (Ω·m)
- Familiarity with Ohm's Law (V = IR)
- Knowledge of geometric calculations for area (A = L x W)
- Basic concepts of cell membrane structure and properties
NEXT STEPS
- Learn about the implications of electrical properties in biological membranes
- Study the effects of varying resistivity on current flow in different materials
- Explore advanced applications of Ohm's Law in biological systems
- Investigate the role of ion channels in cellular electrical activity
USEFUL FOR
Students in biology or physics, electrical engineers, and researchers interested in biophysics or cellular physiology will benefit from this discussion.