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Voltage-gated sodium channels at a neuron’s initial segment are triggered to open when the membrane becomes more positive.

The type of neuronal circuit that spreads information from one presynaptic neuron to several postsynaptic neurons is a _____________ circuit.

________ form myelin in the spinal cord.

In both the cerebrum and the cerebellum, white matter lies deep to superficial gray matter.

The type of neuronal circuit that uses feedback to produce a repeated, cyclical stimulation of the circuit is a _____________ circuit.

The cerebral cortex consists of ______ matter.

Dura mater is made of dense irregular connective tissue in 2 layers:  One is Meningeal layer (deeper layer of dura) and another one Periosteal layer (more superficial layer of dura)

Neurotransmitters can be excitatory, inhibitory, or both depending on their receptor.

Arachnoid mater is the innermost of the meninges; adheres to brain surface made up with thin layer of areolar connective tissue

The _________ respiratory center regulates the skeletal muscles involved in breathing.