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20 Cards in this Set
- Front
- Back
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. The computational function/power of neurons is determined by:
a) the structure of individual neurons b) the interconnectivity of neurons within the brain c) the size of the action potential d) both (a) and (b) e) none of the above |
d) both (a) and (b)
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What is the speed of the action potential as it propagates along the axon?
a) 1-10 ms b) ~ 70-110 s c) ~ 1-100 m/s d) 65 ms e) ~ 250 m/s |
c) ~ 1-100 m/s
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The Sodium/Potassium pump maintains what type of ion concentration inside the cell relative to the concentration outside the cell?
a) sodium concentration high/potassium concentration low b) sodium concentration low/calcium concentration high c) potassium concentration high/calcium concentration low d) potassium concentration low/sodium concentration low e) sodium concentration low/potassium concentration high |
e) sodium concentration low/potassium concentration high
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What are the three major functional groups of neurons?
a) motor, synaptic, sensory b) sensory, motor, intraneuronal c) local, projection, relay d) motor, sensory, interneuronal e) unipolar, bipolar, multipolar |
d) motor, sensory, interneuronal
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What cell in the central nervous system plays an important role in forming the blood-brain barrier?
a) astrocytes b) microglia c) Schwann cells d) oligodendrocytes e) radial glia |
a) astrocytes
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Sensory input neurons are typically what type of cell?
a) multipolar cells b) bipolar cells c) unipolar cells d) retinal cells e) none of the above |
b) bipolar cells
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Most neurons, regardless of type, have 4 functional regions in common. Which of the following is NOT one of these regions?
a) input component b) trigger or integrative component c) output component d) fast spiking component e) conductile component |
d) fast spiking component
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Which of the following is false with respect to the action potential?
a) It is an all or none signal b) It is generated at the axon hillock c) It is a result of a change of potential difference across the cell membrane d) It can propagate both down the length of the axon and back propagate to the cell body and dendrites e) The strength of the action potential is proportionate to the change in potential across the cell membrane |
e) The strength of the action potential is proportionate to the change in potential across the cell membrane
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All sensory input that reaches the brain must first be translated into what type of signal?
a) magnetic b) gravitronic c) electrical d) statistical e) functional magnetic resonance signal |
c) electrical
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Rene Descartes believed the "seat of consciousness" was an area of the brain called the
a) pituitary gland b) pineal gland c) adrenal gland d) hypothalamus e) none of the above |
b) pineal gland
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This part of the neuron receives most incoming signals:
a. Axon b. Axon hillock c. Dendrite d. Soma e. Myelin sheath |
c. Dendrite
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. ______ perform important “housekeeping chores” with some exceptions.
a. Glial cells b. Neurons c. Axons d. Dendrites e. Nodes of Ranvier |
a. Glial cells
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. __________ insulate the axons of neurons with a myelin sheath.
a. Schwann cells b. Oligodendrocytes c. Microglia d. Both A and B e. None of the above |
d. Both A and B
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. Presynaptic and postsynaptic cells are separated by a space called the:
a. Dendritic gap b. Axon hillock c. Node of ranvier d. Point of no return e. Synaptic cleft |
e. Synaptic cleft
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These cells have a SINGLE process, with different segments serving to receive and transmit signals (HINT: these are very common in the invertebrate nervous system):
a. Bipolar cells b. Pyramidal cells c. Purkinje cells d. Glial cells e. Unipolar cells |
e. Unipolar cells
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Nodes of Ranvier are:
a) extensions of the nucleus where proteins are synthesized b) where action potential is regenerated c) radial glia d) both a & b e) none of the above |
b) where action potential is regenerated
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Parallel distributed processing refers to:
a) the role of the corpus callosum b) a form of aphasia c) different components of a single behavior being processed in different regions of the brain d) the action of ion pumps e) all of the above |
c) different components of a single behavior being processed
in different regions of the brain |
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The blood-brain barrier:
a) is a relatively unimportant aspect of brain function b) protects the brain but complicates drug delivery c) is found in the hypothalamus d) prevents movement of molecules from blood to brain e) both b & d |
e) both b & d
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Neuroendocrine cells attach to:
a) capillaries b) the axon hillock c) growth factors d) myelin e) none of the above |
a) capillaries
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Once past transducers, sensory information:
a) manifests as visual representations in the brain b) is simply action potential and neurotransmitters c) is stored for later use d) dissipates e) none of the above |
b) is simply action potential and neurotransmitters
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