Neuroscience Quiz (8-10)

What is the function of the dendritic arbor of a neuron?

• To produce myelin for the axons

• To connect other neurons within the nervous system

• To regulate the chemical makeup of the extracellular fluid

• To receive information from the body or brain

Which type of neuron brings movement commands to the muscles?

• Sensory neuron

• Interneuron

• Motor neuron

• Oligodendrocyte

What is the main difference between sensory neurons and motor neurons?

• Sensory neurons have dendrites at both ends connected by a long axon

• Motor neurons have a soma at one end of the cell surrounded by a small set of dendrites

• Sensory neurons have a very large, long axon going out to the muscle

• Motor neurons bring sensory input from the body to the brain

What is the function of grey matter in the central nervous system?

• To contain the cell bodies and dendritic arbors of neurons

• To regulate the chemical makeup of the extracellular fluid

• To form the myelin sheath around neuronal axons

• To connect other neurons within the nervous system

Where is the white matter located in the brain?

• In the spinal cord

• In the blood brain barrier

• Tucked inside

• On the outside

Which glial cell type is specialized for myelinating axons in the central nervous system?

• Microglia

• Schwann cell

• Oligodendrocyte

• Astrocyte

What is the role of astrocytes in the nervous system?

• To form part of the blood brain barrier

• To provide the glue to hold together the neural networks in the brain

• To regulate the chemical makeup of the extracellular fluid

• To protect neurons from toxins and invaders

What is the function of microglia in the brain?

• To provide the glue to hold together the neural networks in the brain

• To protect neurons from toxins and invaders

• To regulate the chemical makeup of the extracellular fluid

• To form part of the blood brain barrier

What is the main role of the blood brain barrier?

• To keep infections from damaging the neurons

• To maintain the proper balance of ions

• To allow nutrient molecules to pass from the bloodstream into the brain

• To remove excess signaling molecules

What is the appearance of myelin?

• Dark grey

• Tan

• White

• Red