Explain the all-or-none principle in nerve propagation. Describe the role of the threshold in this event. (6 points)
a) The all-or-none principle states that once a nerve impulse is initiated, it will propagate along the entire length of the neuron without decreasing in intensity. The threshold is the level of depolarization required to trigger an action potential.
b) The all-or-none principle suggests that nerve impulses can vary in strength depending on the stimulus, while the threshold determines the maximum amplitude of the action potential.
c) The all-or-none principle asserts that nerve impulses are always of the same intensity, regardless of the strength of the stimulus. The threshold sets the pace of nerve propagation.
d) The all-or-none principle implies that nerve impulses can be partially transmitted along the neuron, with the threshold regulating the speed of propagation.
