Biology Forums - Study Force

A nerve impulse travels fastest along ________ axons of ______ diameter.
 
  A.  myelinated, small
  B.  unmyelinated, small
  C.  myelinated, large
  D.  unmyelinated, large

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(Question 2) One main category of neurotransmitters is amino acids.
 
  Indicate whether this statement is true or false.

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(Question 3) The slowest category of nerve fibers are the
 
  A. A fibers, and they conduct impulses at 10 meters per second.
  B. C fibers, and they conduct impulses at 1 meter per second.
  C. D fibers, and they conduct impulses at 0.1 meter per second.
  D. C fibers, and they conduct impulses at 100 meters per second.
  E. D fibers, and they conduct impulses at 0.01 meter per second.

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(Question 4) Neurotransmitter is released from the synaptic knob by exocytosis, and it then diffuses across the synaptic cleft.
 
  Indicate whether this statement is true or false.

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(Question 5) The primary inhibitory neurotransmitter in the brain is
 
  A. glutamate.
  B. valine.
  C. GABA.
  D. serotonin.
  E. serine.

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(Question 6) Catecholamines are a subtype of __________ neurotransmitter.
 
  A.  acetylcholine
  B.  neuropeptide
  C.  monoamine
  D.  amino acid
  E.  soluble gas

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(Question 7) In a myelinated axon, the greatest concentration of voltage-gated ion channels is in the
 
  A. myelinated regions.
  B. neurofibril nodes.

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(Question 8) The monoamine that has functions related to sleep, appetite, cognition, and mood is
 
  A. dopamine.
  B. serotonin.
  C. norepinephrine.
  D. acetylcholine.
  E. epinephrine.

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(Question 9) When a nerve impulse reaches the transmissive segment of a neuron,
 
  A. calcium is pumped into the neuron and neurotransmitter diffuses out through channels.
  B. calcium is released from the neuron along with neurotransmitter from synaptic vesicles.
  C. calcium diffuses into the neuron and neurotransmitter is released by exocytosis.
  D. calcium and neurotransmitter diffuse into the synaptic knob.
  E. calcium is immediately pumped out of the neuron and vesicles of neurotransmitter undergo phagocytosis.

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(Question 10) In human brain anatomy, the term ______ is synonymous with anterior.
 
  A. caudal
  B. dorsal
  C. rostral

1) C

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2) TRUE

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3) B

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4) TRUE

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5) C

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6) C

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7) B

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8) B

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9) C

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10) C

So very smart