kahoot question
 8.1-8.3
  1) the brain & spinal cord comprise the central nervous system
   2) part of the peripheral nervous system that brings info to the central nervous system is the afferent division
   3) most neurons in the brain are multipolar
    4) cytoplasmic extensions that, together with the cell body, provide the main receptive surfaces for neurons are the dendrites
  5) the largest and most numerous of the glial cells in the central nervous system are the astrocytes
  6) the myelin sheaths that surround the axons of some of the CNS are formed by oligodendrocytes
  7) small phagocytic cells that are especially obvious in damaged tissue in the CNS are the microglia
     8) aggregations of ribosomes in neurons are referred to as Nissl bodies
  9) neurons that have 1 axon and 1 dendrite with the soma between them are bipolar
 10) more neurons lack centrioles. this observation explains why these neurons cannot regenerate
  11) the polarization of a nerve fiber refers to having the potassium ions inside the cell and sodium outside the cell
  12) saltatory conduction is faster than conduction on an unmyelinated axon
 13)  opening of sodium channels in the membrane of a neuron results in depolarization 
  14) when a neuron is at rest, which ion passes through its membrane most easily
  15) the all-or-none principal state that all stimuli great enough to bring the membrane to threshold will produce identical action potentials
    8.4-8.6
   1) synaptic knobs occur at the ends of axons
   2) neurotransmitters are released from the synaptic terminals/knobs
  3) chemical synapse dominates the nervous system
  4) the ion needed to initiate the release of acetylcholine into the synaptic cleft is calcium
  5) adrenergic synapse release the neurotransmitter norepinephrine
  6) parts of a reflex arc in the correct order: receptor, sensory neuron, interneuron, motor neuron, effector
 8) specialized membranes that protect the spinal cord are termed spinal meninges
  9) blood vessels servicing the spinal cord are found in the pia meter
  10) the dural sinuses are located in the dura mater
11) subarachnoid space contains a delicate network of collagen and elastin fibers through which cerebrospinal fluid circulates
  12) diffusion across the arachnoid villi returns excess CSF to venous circulation
 13) the projections of gray matter toward the outer surface of the spinal cord are called horns
 14) masses of myelinated nerve fibers appear white
  15) axons crossing from 1 side of the spinal cord to the other within the gray matter are found in the gray commissures
 16) the white matter of the spinal cord contains bundles of axons that share common origins, destinations, and functions
 17) enlargement of the spinal cord occur in segments of the spinal cord that controls the limbs
 18) the entire spinal cord is divided into 31 segments
 19) the horns of the spinal cord contain nerve cell bodies
 20) the posterior horns of the spinal cord contain sensory nuclei
 21) gray matter in the spinal cord mostly interbeurons
 22) if the dorsal root of a spinal nerve is servered, incoming sensory info would be disrupted 

2 components of efferent motor pathway- somatic autonomic