nervous system please help

PLEASE HELP BIO 30 Nervous system


The structural and functional unit of the nervous system is the
A neuron
B gilial cells
C motor nerves
D sensory nerves

All the following factors contribute to the resting membrane potential except
A sodium ions and potassium ions use a pump and atp to move across the neural membrane
B special voltage gates (sodium and potassium) operate in normal neurons impulse transmission
C some negatively charges proteins and chloride ions are unable to diffuse out of the neurons
D the action potential below a threshold level contributes to a resting potential of -70 m V

An impulse from your finger tip travels to the brain for interpretation to reach the brain the impulse travels through a neuron and across the synapses, respectively by
A hormones and sodium ions transfer
B hormones and potassium ions transfer
C chemical transmission and electrical means
D electrical means and chemical transmission


Response to stimulus within the central nervous system (CNS) differs from a response initiated by a reflex because the former
A undergoes depolarization
B has greater speed
C includes interpretation of information
D does not release acetylcholine