In order for a Chi-square test to be valid, a general rule of thumb is that every cell have expected frequencies greater than or equal to 10

Increasing excitatory signals above the threshold for neural activation will not affect the intensity of an action potential. This indicates that a neuron's reaction is

A) inhibited by the myelin sheath. B) delayed by the refractory period. C) an all-or-none response. D) dependent on neurotransmitter molecules. E) primarily electrical rather than chemical.

_______________________ reflexes are important for survival

a. Primitive b. Survival c. Reticular d. Adaptive