BIO202H5 Lecture Notes - Lecture 7: Neuromuscular Junction, Membrane Potential, Neural Pathway
Document Summary
We made a connection to the word signal . Signal refers to action potential > how does the signal travel along the word important? neural pathway. Travelling down the neuron to the neuromuscular junction. Action potential arrives to the synaptic cleft. Flow (current) of energy from one point to another. Ion currents > movement of ions generates a flow. Proportional to membrane area and thickness or quantity of charge needed to create a potential difference between two surfaces of the capacitor. Negatively charged proteins, mostly k+ and less na+ K+ has a tendency to leave cells. Does this through leaky channels > passive diffusion. Na+ has a tendency to enter cells difference. Leaky channels (more k+ channels than na+ channels) This positive and negative charge intracellular and extracellular creates a potential. In both inside the cell and outside the cell there is force of attraction / repulsion between. Active transport > requires energy the ions.
