Nerves Bio 106

Which of the following is the role of the nervous system?

• Gain information about internal and external environments

• Sending hormones to target locations in the body

• Integrate all incoming signals

• Coordinating responses

What is neuron?

• The fundamental unit of the nervous system

• Conducts signals

• Takes advantage of the electrical charge of the plasma membrane

• Send signals to the other nerves

• All of the above

What is a nerve?

• The basic unit of the nervous system

• Composed of multiple bundles axons

• Sends signals to other nerve cells

• A web of of neurons found in the spinal cord

What ion is most concentrated outside of the cell body?

• Na

• K

• Ca

What ion is most concentrated inside of the cell body?

• Na

• K

• Ca

What ion is most concentrated at outside of the terminus?

• Na

• K

• Ca

Is the Ca ion concentrated inside or outside of the the terminus?

• Inside

• Outside

What is label A in the diagram?

• Axon Hillock

• Terminus

• Axon

• Cell Body

• Dendrites

What is label B in the diagram?

• Axon

• Cell body

• Dendrites

• Axon Hillock

• Terminus

What is label C in the diagram?

• Axon

• Axon Hillock

• Dendrites

• Terminus

• Cell Body