Nervous System Quiz

Overview of the Nervous System's Structure and Function

• The nervous system consists of two parts: the central nervous system (CNS) and the peripheral nervous system (PNS).
• The CNS includes the brain, brain stem, and spinal cord, while the PNS includes four systems of nerves.
• The CNS and PNS work together by passing signals between one another through sensory receptors, neurons, and responses.
• The brain is divided into three parts: cerebrum, cerebellum, and brain stem, which control thought, movement, emotion, balance, and basic life functions.
• The spinal cord controls reflexes by directing impulses from sensory neurons to motor neurons without involving the brain.
• The PNS links the CNS to muscles and organs, and it is divided into the somatic nervous system and the autonomic nervous system.
• The autonomic nervous system controls involuntary functions through the sympathetic nervous system (fight vs. flight) and the parasympathetic nervous system (calms the body).
• Cells of the nervous system are grouped into two functional categories: neurons and neuroglia.
• Neurons conduct all major functions on their own and are classified as afferent, interneurons, and efferent based on their functions.
• Neuroglia play a supporting role to the neurons and are divided into CNS and PNS.
• The CNS neuroglia includes astrocytes, oligodendrocytes, ependymal cells, and microglia, while the PNS neuroglia includes Schwann cells and satellite cells.
• The nervous system's functional components include the brain, spinal cord, afferent tracts, efferent tracts, and ganglia, which are protected by bony structures, meninges, and the blood-brain barrier. Neuronal circuits are organized into afferent and efferent tracts, gray and white matter, and reflex pathways.

Test your knowledge of the nervous system's structure and function with this informative quiz. Learn about the central and peripheral nervous system, the brain's different parts, and how the spinal cord controls reflexes. Discover the different types of neurons and neuroglia, and their roles in supporting the nervous system. Explore the autonomic nervous system and its control over involuntary functions. Take this quiz to see how much you know about this complex and essential system!