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trulyabaker
on FreezingBlue Flashcards.
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The _______ of a neuron carries the impulse towards the nucleus.
dendrite
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Which part of a neuron is directly involved with protein sythesis?
- Nissl body
- (cytoplasmic substances/inclusions)
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Which part of neuron comes in close proximity to another neuron at the synapse?
synaptic knob
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The PNS is comprised of cranial nerves and ______.
spinal nerves
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The cells that conduct messages towards the brain are the ________.
sensory neurons
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A morphine-like pain suppressing brain substance is _______.
beta-endorphin
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Collaterals are fibers arising from the ______ of neurons.
axon
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Nerves that carry impulses from the heart to the brain could be classed as ______ fibers.
visceral afferent
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The following could be grouped together except which one?
- association
- motor
- internuncial
- interneuron
motor
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Branched nerve fibers that convey local potential changes toward the cell body of a neuron are called ________.
dendrites
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Which term does not belong with the others?
- brain
- spinal cord
- CNS
- spinal nerve
spinal nerve
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True or False: An effector is usually a muscle or motor nerve.
- False
- - an effector is usually a muscle or gland
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True or False: Nervous tissue includes areas of connective tissue.
- True
- - there are connective tissue fibers that surround nerve fibers
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True or False: Somatic afferent fibers would carry sensor impulses away from the brain, towards areas such as the eye.
- False
- - impulses are carried in these somatic afferent fibers, away from the eye
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True or False: A damaged CNS nerve could not regenerate as easily as a PNS fiber.
- True
- - PNS fibers are surrounded with Schwann cells that enable regeneration
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True or False: A damaged phrenic nerve would heal more slowly than a severed spinal nerve.
- False
- -the phrenic nerve is a PNS nerve with a Schwann cell neurolemma and would heal fast than CNS spinal cord fiber without one
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True or False: The nucleus of a neuron is always located within the cell body region.
- True
- - the major features of the cell body are the nucleas and Nissl bodies
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True or False: All neurons have at least one dendrite but one or more axons.
- False
- - neurons have one axon, and one or more dendrites
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True or False: Only axons are capable of conducting action potentials.
- True
- - because only axon have voltage gated channels, only they can have action potentials
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The CNS is comprised of the brain and _________.
spinal cord
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