Nervous system

What are the two main structural divisions of the nervous system?

• The peripheral nervous system and the central nervous system

• The dendritic and the axonal systems

• The sympathetic and parasympathetic

• The brain and spinal cord

The central nervous system consists of the________.

• sympathetic and parasympathetic nervous systems

• brain and spinal cord

• sensory and motor systems

• cortex, medulla, and myelin sheath

Which of the following are parts of neurons?

• brain, spinal cord, and vertebral column

• dendrite, axon, and cell body

• midbrain, pons, and medulla oblongata

• cortex, medulla, and myelin sheaths

A dendrite conducts nerve impulses______the cell body

• away from

• toward

• both toward and away

• around, bypassing

An axon conducts nerve impulses______the cell body

• away from

• toward

• both toward and away from

• around, bypassing

Neuroglial (glia) cells supports and provide protection and insulation for the_____.

• Muscle cells

• Glands

• Neurons

• Nephrons

Neurons often have many short dendrites and a long axon

• True

• False

Transmission across a synapse is achieved mainly by a ____.

• Ionic Bonding

• Diffusion of neurotransmitter across the cleft

• Physical contact of axon to dendrite allowing the nerve impulse to continue onward

• Diffusion of sodium ions across the cleft

Neurons that carry impulses away from the central nervous system to the muscles and glands are called?

• Sensory/afferent nerves

• Efferent/motor nerves

• interneurons

• none of the above

The somatic (body) division of the nervous system regulates events that are under ______ control and the autonomic division regulates events that are under____ control

• Involuntary, voluntary

• Voluntary, involuntary