Neural tissue
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| Which of the following is not a function of the nervous system? | direct long-term functions, such as growth
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| The ________ nervous system is composed of the brain and spinal cord. | central
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| The ________ nervous system controls the skeletal muscles. | Somatic
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| The part of the peripheral nervous system that carries sensory information to the CNS is designated | Afferent
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| Which of the following is not a function of the neuroglia? | Memory
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| Which of the following are a type of glial cell found in the peripheral nervous system? | satellite cells
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| The largest and most numerous of the glial cells in the central nervous system are the | astrocytes
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| Functions of astrocytes include all of the following, except | conducting action potentials.
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| The myelin sheath that covers many CNS axons is formed by | oligodendrocytes
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| ________ line the brain ventricles and spinal canal. | Ependymal cells
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| Small, wandering cells that engulf cell debris and pathogens in the CNS are called | microglia
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| The neurilemma of axons in the peripheral nervous system is formed by | Schwann cells.
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| Glial cells that surround the neurons in ganglia are | satellite cells
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| Which of the following is not a recognized structural classification for neurons? | pseudopolar
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| The most abundant class of neuron in the central nervous system is | multipolar
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| Clusters of RER and free ribosomes in neurons are called | Nissl bodies.
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| The cytoplasm that surrounds the nucleus of a neuron is called the | perikaryon
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| The axon is connected to the soma at the | axon hillock
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| Axons terminate in a series of fine extensions known as | telodendria
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| The site of intercellular communication between neurons is the | Synapse
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| The rabies virus travels to the CNS via | retrograde axoplasmic transport.
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| Neurons that are rare, small, and lack features that distinguish dendrites from axons are called | anaxonic
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| Neurons in which dendritic and axonal processes are continuous and the soma lies off to one side are called | Unipolar
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| Neurons that have one axon and one dendrite, with the soma in between, are called | Bipolar
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| Neurons that have several dendrites and a single axon are called | Multipolar
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| Sensory neurons of the PNS are | Unipolar
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| Which of the following activities or sensations is not monitored by interoceptors? | Sight
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| Which of the following is not involved in creating the resting potential of a neuron? | membrane permeability for sodium ions greater than potassium ions
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| Which of the following interactions between electrical and chemical gradients does not lead to the establishment of a neurons resting potential? | Electrical forces push sodium ions out of the cell
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| At the normal resting potential of a typical neuron, its Na-K ion exchange pump transports | 3 intracellular sodium ions for 2 extracellular potassium ions.
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| Ion channels that are always open are called ________ channels. | Leak
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| Opening of sodium channels in the axon membrane causes | depolarization and increased positive charge inside the membrane. A and D
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| Voltage-gated channels are present | in the membrane that covers axons
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| The following are the main steps in the generation of an action potential. | 4, 6, 7, 1, 2, 3, 5
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| The sodium-potassium ion exchange pump | moves sodium and potassium opposite to the direction of their electrochemical gradients.
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| The all-or-none principle states that | all stimuli great enough to bring the membrane to threshold will produce identical action potentials
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| _______ are the most numerous type of neuron in the CNS | Interneurons
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| The axon is connected to the soma at the | axon hillock
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| Which of the following does not influence the time necessary for a nerve impulse to be transmitted? | whether or not the impulse begins in the CNS
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| Which of the following comparisons between neurons and muscle tissue is false? | Action potentials are briefer in muscle fibers
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| ) Which type of synapse is most common in the nervous system | chemical
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| The ion that triggers the release of acetylcholine into the synaptic cleft is | Calcium
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| If the chemically gated sodium channels in the postsynaptic membrane were completely blocked | synaptic transmission would fail
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| The same ________ can have different effects depending on the properties of the ________ | neurotransmitter; receptor
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| ) Raising the potassium ion concentration in the extracellular fluid surrounding a nerve cell will have which effect? | depolarize it
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| The smallest neuroglia of the CNS are the | microglia
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| The largest and most numerous neuroglia in the CNS are the | astrocytes
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| The function of the astrocytes in the CNS includes which of the following? | all
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| account for roughly half of the volume of the nervous system | Neuroglia
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| _ are the most numerous type of neuron in the CNS | Interneurons
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| In a(n) ________ neuron, the dendrites and axon are continuous or fused | Unipolar
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| neurons are short, with a cell body between dendrite and axon, and occur in special sense organs | Bipolar
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