PSB2000 The Nerve Impulse.docx

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Department
Psychology
Course
PSB 2000
Professor
Stacey Mc Callister
Semester
Fall

Description
The Nerve Impulse 1. Cross section of an axon a. Ions inside and outside of the cell are unequally distributed b. The inside of the cell is negatively charged compared to the outside 2. Resting Potential a. Unequal distribution of ions = the inside of the cell is negatively charged compared to outside i. The cell’s membrane is “polarized” b. Different 3. Forces acting on sodium and potassium a. Concentration gradient: ions flow from areas of high concentration to low concentration i. Sodium is ten time more concentrated outside the cell ii. Potassium
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