HTHSCI 1H06 Chapter Notes - Chapter 432-440: Digestion, Neurotransmitter, Tears
10 Oct 2017
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The movement of nerve impulses down neurons. this is sometimes called. Nerve conduction: the propagation of nervous impulses. Ap forms here, travels down the axon to the axon terminals. Move down the axon towards the axon terminals. Plasma membrane of the axon separates negative cytoplasm from the positive ecf. There are more positive ions on the outside than the inside, which is true in all living cells. Depolarization along the axon: stimulus (increase in voltage) triggers an action potential which depolarizes membrane. Ensures transmission of signal occurs in one way direction and ensures they"re. Allows cells to recover to resting state, to keep them from running low due to loss of ions. Propagation: keeps its strength and conduction is called propagation. There are 2 types of propagation: continuous conduction and saltatory conduction. Step by step depolarization and repolarization in each segment of plasma membrane. Ions flow through channels in each segment of membrane, and occur in muscle fibers.
