structure of nervous system

Which best describes myelin?

• it is a neurotransmitter that triggers muscle contraction

• it is a protein that builds the axon

• it is a fat that speeds the message along the axon

• it is a fat that helps the neuron "hear" messages

The long, fiber like part of a neuron which the cell sends information to receiving neurons. Labelled D in diagram.

• Synapse

• Axon

• Axon Terminal

• Dendrite

Myelin would be made by what structure

• the red one

• the blue one

• the green one

• the purple one

Label the Neuron-What does the letter "D" represent?

• Dendrite

• Axon

• Myelin Sheath

• Axon Hillock

Which ions are involved in an action potential?

• Na; Cl
• Na; K
• K; Cl
• Na; Ca

Located between the cerebrum and midbrain

_____ neurons carry messages away from the central nervous system and out to muscles or glands. The RED neuron in diagram.

• sensory

• motor

• inter

• central

Action potentials run along the ______ from ______ to ________.

• axon, dendrites, axon terminals

• axon, axon terminals, dendrites

• dendrites, axon, axon terminals

• axon terminals, axon, dendrites

How is a message delivered from the "sending" neuron to the "receiving" axon?

• sympathetic nerves

• hormones

• medulla oblongata

• neurotransmitters

What kind of neuron carries information from our eyes to our brain?

• Motor neuron

• Sensory neuron

• Nerve

• Spinal neuron