BIOL 1010 Nervous System Part 1

The central nervous system is composed of... select TWO options!

• brain

• limbs

• spinal cord

• thoracic cavity

________ are accessory cell types that can provide support and nourishment to neurons.

• Nephrons

• Neurons

• Schwann cells

• Neuroglia

What region of a neuron contains the nucleus?

• Dendrite(s)

• Cell body

• Axon

• Axon terminal

Which direction does a nerve impulse travel?

• From the axon terminal to the Nodes of Ranvier

• From the axon terminal to the cell body

• From the cell body to the dendrites

• From the cell body to the axon terminal

The Myelin Sheath is composed of a specialized cell type called...

• Goblet cells

• Axons

• Neurons

• Schwann cells

What are the gaps on a myelinated axon called that have no myelin?

• Nodes of Ranvier

• Neuronal gaps

• Nodes of Schwann Cells

• Interneurons

Resting potential is measured at ______ mV.

• +35

• +70

• -55

• -70

An action potential is measured at ______ mV.

• +35

• -70

• +70

• -55

During depolarization, ________ ions move into the axon.

• Sodium

• Potassium

• Calcium

• Iron

During repolarization, _________ ions move out of the axon.

• Sodium

• Potassium

• Calcium

• Iron