Neuro I, Structure and Function - Chapter Assessment

The central nervous system is comprised of the brain and _________.

• Cranial nerves

• Spinal cord

• Peripheral nerves

• Spinal nerves

The _________ of a neuron carries the impulse towards the nucleus.

• Cell body

• Myelin

• Axon

• Dendrite

Which part of a neuron is directly involved with protein synthesis?

• Cell body

• Neurofibrils

• Nissl body

• Neurolemma

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Which part of a neuron directly contacts another neuron at the synapse?

• Synaptic knob

• Dendrite

• Axon

• Collateral fiber

The phagocytic cells in the CNS are the _________.

• Astrocytes

• Microglia

• Oligodendrocytes

• Ependymal cells

The ______ cells provide a means of acquiring nutrients in the brain.

• Astrocyte

• Microglia

• Ependymal

• Oligodendrocyte

The resting potential of a neuron is _______ mV.

• +30

• -70

• 0

• -90

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The minimal stimulus needed to cause a neuron to transmit an impulse is called the ________.

• Action potential

• Resting potential

• Threshold

• Refractory period

Saltatory conduction occurs when an impulse jumps from _______.

• Axon to dendrite

• Node to node

• Dendrite to axon

• Node of Ranvier to axon

The most common neurotransmitter in the body is _______.

• Norepinephrine

• Adrenaline

• Acetylcholine

• Dopamine