NT's, Neuroglia, & Neurons

What type of neuroglial cell attaches neurons to capillaries, creating a blood-brain barrier & maintenance?

• Astrocyte
• Oligodendrocytes
• Microglial
• Ependymal

What is the main function of oligodendrocytes?

• Production of the insulating sheath of the axon

• Maintain the health of the neuron
• Brace and support the neuron to it's nurtient supply
• Lining of the central cavities to circulate spinal fluid

Neuroglial cells that form the fatty myelin sheath on neurons in the CNS are ___________ in the PNS are ________________?

• ganglia and oligodendrocytes

• astrocytes and schwann cells

• schwann cells and oligodendrocytes

• oligodendrocytes and schwann cells

Small cells that engulf and destroy microbes and cellular debris in the CNS

• microglia

• horns

• neuroglia

• astrocytes

Produce cerebrospinal fluid in the brain & spinal cord

• ependymal cells

• oligodendrocytes

• microglia

• astrocytes

Type of neuron that perceive information about your environment.

• Motor Neuron

• Interneuron

• Sensory Neuron

Type of neuron that sends nerve impulses to muscles and gland, by the command of other neurons.

• Motor Neurons

• Interneurons

• Sensory Neurons

When a neuron is depolarized, what are the first channels to open?

• Sodium
• Potassium
• Calcium
• ACTH

When a neuron is resting, the inside of the axon has a ____________ charge.

• -55 mV
• -70 mV
• 40 mV
• -75 mV

Why is -55 mV a significant number?

• This is the largest charge achieved during an action potential
• This is the threshold required to complete an action potential
• This is the resting charge of a neuron
• This is the charge when all the sodium is inside the cell