front 1 Ciliated CNS neuroglia that play an active role in moving the
cerebrospinal ependymal cells Schwann cells oligodendrocytes astrocytes satellite cells | back 1 ependymal cells |
front 2 Adrenergic synapses release the neurotransmitter: acetylcholine norepinephrine dopamine serotonin GABA | back 2 norepinephrine |
front 3 Schwann cells in the PNS are functionally similar to _____ in the CNS. oligodendrocytes astrocytes ependymal cells microglia | back 3 oligodendrocytes |
front 4 The axon is connected to the soma at the synapse. synaptic knobs. collaterals. axon hillock. telodendria. | back 4 axon hillock. |
front 5 The period after an initial stimulus when a neuron is not sensitive to another stimulus is the: resting period repolarization period depolarization period refractory period | back 5 refractory period |
front 6 The most abundant class of neuron in the central nervous system is bipolar. pseudopolar. multipolar. anaxonic. unipolar. | back 6 multipolar. |
front 7 Which of the following are a type of glial cell found in the
peripheral astrocytes microglia ependymal cells satellite cells oligodendrocytes | back 7 satellite cells |
front 8 Voltage regulated channels can be found: at the motor end plate on the surface of the dendrites in the membrane that covers axons on the soma of neurons along the perikaryon of neurons | back 8 in the membrane that covers axons |
front 9 Glial cells that surround the neurons in ganglia are astrocytes. satellite cells. oligodendrocytes. ependymal cells. microglia. | back 9 satellite cells. |
front 10 The following are the main steps in the generation of an action potential. 1. Sodium channels are inactivated. The proper sequence of these events is 4, 2, 5, 6, 7, 3, 1. 6, 7, 4, 1, 2, 3, 5. 4, 6, 7, 3, 2, 5, 1. 2, 4, 6, 7, 1, 3, 5. 4, 6, 7, 1, 2, 3, 5. | back 10 4, 6, 7, 1, 2, 3, 5. |
front 11 Opening of sodium channels in the membrane of a neuron results in: depolarization repolarization hyperpolarization increased negative charge inside the membrane reestablishing the resting potential | back 11 depolarization |
front 12 Which of these ions is actively transported through the cell membrane
to Cl Mg Ca K Na | back 12 Na |
front 13 Collections of nerve cell bodies outside of the central nervous
system are nuclei nerves ganglia tracts | back 13 ganglia |
front 14 The sodium pump: pumps three sodium ions outside the cell and two potassium ions inside pumps two sodium ions outside the cell and three potassium ions inside pumps three sodium ions inside the cell and two potassium ions outside pumps two sodium ions inside the cell and three potassium ions outside | back 14 pumps three sodium ions outside the cell and two potassium ions inside |
front 15 The part of a neuron that conducts impulses away from its cell body
is axon dendrite neurolemma soma nissil body | back 15 axon |
front 16 Functions of astrocytes include all of the following,
except guiding neuron development. maintaining the blood-brain barrier. responding to neural tissue damage. conducting action potentials. | back 16 conducting action potentials. |
front 17 An inhibitory postsynaptic potential (IPSP) is associated with: a change in sodium ion permeability hyperpolarization opening of voltage-gated channels lowering the threshold for an action potential to occur | back 17 hyperpolarization |
front 18 Saltatory conduction is made possible by: the myelin sheath large nerve fibers diphasic impulses rapid conduction of local potentials nissil bodies | back 18 the myelin sheath |
front 19 Axons terminate in a series of fine extensions known as: telodendria synaptic knobs collaterals hillocks synapses | back 19 telodendria |
front 20 Which of the following is not a function of the neuroglia? secretion of cerebrospinal fluid maintenance of blood-brain barrier phagocytosis memory support | back 20 memory |