Neurons

Neurons act as a means of communication for the nervous system

• true

• false

sensory neurons are found in ...

• Effector receptors and carry nerve impulses to the spinal cord and brain

• Brain and spinal cord and allow sensory and motor neurons to communicate.

• central nervous system (CNS) and control muscle movements

Motor neurons are found in ...

• Effector receptors and carry nerve impulses to the spinal cord and brain

• Brain and spinal cord and allow sensory and motor neurons to communicate.

• central nervous system (CNS) and control muscle movements

Relay neurons are found in ...

• Effector receptors and carry nerve impulses to the spinal cord and brain

• Brain and spinal cord and allow sensory and motor neurons to communicate.

• central nervous system (CNS) and control muscle movements

The cell body (soma) includes a nucleus which contains the_________

• nerve impulses

• Genetic material

• Myelin Sheath

• Nodes of Ranvier

Branchlike structures called dendrites protrude from the cell body, they carry _______

• nerve impulses

• Genetic material

• Myelin Sheath

• Nodes of Ranvier

The __________ carries the impulses away from the cell body down the length of the neuron.

• Soma

• Axon

• Myelin Sheath

• Nodes of Ranvier

The axon is covered in a fatty layer of __________ that protects the axon and speeds up electrical transmission of the impulse

• Soma

• Axon

• Myelin Sheath

• Nodes of Ranvier

So the myelin sheath is segmented by gaps called ___________. These speed up the transmission of the impulse by forcing it to ‘jump’ across the gaps along the axon.

• Soma

• Axon

• Myelin Sheath

• Nodes of Ranvier

When a neuron is in a resting state the inside of the cell is ______ charged compared to the outside.

• Positively

• Negatively