21) These regions of the neuron direct electrical currents toward the cell body.
A) synapse
B) axon terminal
C) axon
D) cell body
E) dendrite
22) In this part of a neuron, neurofilaments, actin microfilaments, and microtubules are particularly abundant, providing structural support and a transport network.
A) synapse
B) axon terminal
C) axon
D) cell body
E) dendrite
23) This part of the neuron may have branching collaterals.
A) synapse
B) axon terminal
C) axon
D) cell body
E) dendrite
24) This region of a neuron contains chromatophilic substance or Nissl bodies.
A) synapse
B) axon terminal
C) axon
D) cell body
E) dendrite
25) This neuronal region transmits electrical impulses away from the cell body.
A) synapse
B) axon terminal
C) axon
D) cell body
E) dendrite
26) A somatic motor neuron carries
A) information that signals muscle contraction in the organs in the ventral cavity.
B) information, such as pain, from the viscera in the ventral cavity to the CNS.
C) motor commands to the skeletal musculature.
D) information from the skin to the CNS.
27) Most synapses transmit communicating signals using
A) chemical signaling molecules-neurotransmitters.
B) electrical impulses travelling through gap junctions.
C) physical contact between adjacent neurons.
D) chemical signaling molecules released from neuroglia.
28) Which of the following is
not
considered a special somatic sense?
A) smell
B) taste
C) pain
D) equilibrium
29) Which of the following is
not
a characteristic of neurons?
A) longevity
B) inability to divide
C) high metabolic rate
D) ability to survive without oxygen
30) Neurofibrils
A) form synapses with axons of postsynaptic neurons.
B) help circulate cerebrospinal fluid.
C) prevent the neuron from being pulled apart when subjected to tensile forces.
D) receive incoming stimuli and pass the signal toward the cell body.