Glial cells differ from neurons in that they
A. are larger and capable of meiosis.
B. are smaller and capable of mitosis.
C. are found only in the CNS.
D. are found only in the PNS.
E. transmit nerve impulses much more slowly.
(
Question 2) Which statement accurately compares the transmission speed of the different types of synapses?
A. Transmission at chemical synapses involves a brief synaptic delay, but electrical synapses are faster.
B. Transmission at both chemical and electrical synapses involves a synaptic delay of approximately 1 millisecond.
C. Transmission at electrical synapses involves a brief synaptic delay, but chemical synapses are faster.
D. Electrical synapses have a constant delay of 1 millisecond, but chemical synaptic delays vary between 0.1 and 0.3 millisecond.
(
Question 3) Which is true regarding the action of a neurolemmocyte?
A. Each neurolemmocyte can form a myelin sheath around many axons simultaneously.
B. A neurolemmocyte is responsible for forming part of the blood-brain barrier.
C. Neurolemmocytes function only within the CNS.
D. Each neurolemmocyte can wrap only a 1 mm portion of a single axon.
E. A neurolemmocyte attacks pathogens.
(
Question 4) Electrical synapses involve coupling of neurons by
A. synaptic clefts.
B. desmosomes.
C. gap junctions.
D. satellite cells.
(
Question 5) When transmission occurs at a synapse, neurotransmitter is released by
A. the presynaptic neuron's synaptic knob into the synaptic cleft.
B. the postsynaptic neuron's dendrites into the synaptic cleft.
C. the presynaptic neuron's dendrites into the synaptic cleft.
D. the presynaptic neuron's soma into synaptic vesicles.
E. the postsynaptic neuron's telodendria into the axon hillock.
(
Question 6) In a mixed nerve
A. some axons transmit sensory information and others transmit motor information.
B. individual axons transmit both sensory and motor information.
C. chemical synapses occur along with electrical synapses.
D. astrocytes are interspersed with ependymal cells.
(
Question 7) Spinal nerves extend from the spinal cord, whereas ________ nerves extend from the brain.
Fill in the blank with correct word.
(
Question 8) A mixed nerve is one that contains both
A. cranial and spinal nerve fibers.
B. sensory and motor neurons.
C. unipolar and bipolar neurons.
D. an endoneurium and an epineurium.
E. presynaptic and postsynaptic neurons.
(
Question 9) A nerve cell that has dendrites but no axons is categorized as a(n) ___________ neuron.
Fill in the blank with correct word.
(
Question 10) Typically, a multipolar neuron has many dendrites and one axon extending from the cell body.
Indicate whether this statement is true or false.
Quick Reply
