An action potential in an excitatory presynaptic nerve. 2. an in the dendrites of the postsynaptic nerve. 3. this spreads passively to the 4. depolarization of this region opens voltage-gated channels. 5. suf? cient membrane depolarization to opens enough of these channels to produce an action potential. 6. in non myelinated axons: the currents associated with the action potential spread to the region of the axon. 7. in myelinated axons: the currents associated with the action potential spread to the next 8. the action potential travels down the axon to the

An action potential is an excitatory presynaptic nerve. An EPSP (Excitatory postsynaptic potential) takes place in the dendrites of the postsynaptic nerve. This spreads passively to the axon hillock. Depolarization of this region opens voltage-gated ionic channels. Sufficient membrane depolarization to threshold opens enough to these channels to produce an action potential.
Non myelinated axon; the currents associated with the action potential spread to the depolarized region of the axon.
In myelinated axon; the currents associated with the action potential spread to the next Node of Ranvier.
The action potential travels down the axon to the axon terminals.

Codominance is when alleles have the same amount of dominance and both are expressed in a heterozygous individual(ab blood type, roan cow). in a heterozygote with incomplete dominance, the phenotype seen is an intermediate of the dominant and recessive phenotype.(pink flowers when the dominant form is red snd recessive form is white)