Introduction to psychology

The "emergency" part of the nervous system that prepares the body for "fight or flight" is the __________ branch.

	amounts of DNA and RNA.
	types of neurotransmitters on either side of the nerve cell membrane.
	types of neurons inside and outside the nerve cell membrane.
	concentrations of ions on either side of the nerve cell membrane.

	the brain.
	the spinal cord.
	motor neurons.
	connector neurons or interneurons.

	absorbing neural impulses.
	imitating or canceling the effects of neurotransmitters.
	changing the sodium balance in the synapse.
	duplicating the effect of potassium in the nuclei.