In nerve cells, the initiation of the Blank 1. Fill in the blank, read surrounding text. triggers opening of Na+ channels, then maximal depolarization triggers the opening of the K+ channels. In cardiac conductive cells, a different type of Na+ channels is “leaky” so there is a slow, continuous, spontaneous Blank 2. Fill in the blank, read surrounding text. , which then triggers the opening of Ca+ channels that bring the cell to maximal depolarization, which in turn triggers the opening of the Blank 3. Fill in the blank, read surrounding text. channels. In cardiac contractile cells, like in skeletal muscle, action potential triggers the opening of Blank 4. Fill in the blank, read surrounding text. channels which brings the cell quickly to maximal depolarization, but the opening of K+ channels does not immediately repolarize the cell, because slow Blank 5. Fill in the blank, read surrounding text. channels are still open for about 175ms.
In nerve cells, the initiation of the Blank 1. Fill in the blank, read surrounding text. triggers opening of Na+ channels, then maximal depolarization triggers the opening of the K+ channels. In cardiac conductive cells, a different type of Na+ channels is “leaky” so there is a slow, continuous, spontaneous Blank 2. Fill in the blank, read surrounding text. , which then triggers the opening of Ca+ channels that bring the cell to maximal depolarization, which in turn triggers the opening of the Blank 3. Fill in the blank, read surrounding text. channels. In cardiac contractile cells, like in skeletal muscle, action potential triggers the opening of Blank 4. Fill in the blank, read surrounding text. channels which brings the cell quickly to maximal depolarization, but the opening of K+ channels does not immediately repolarize the cell, because slow Blank 5. Fill in the blank, read surrounding text. channels are still open for about 175ms.
Word List: K+, Na+, Ca+, Cl-, action potential, depolarization, hyperpolarization, repolarization,
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