Nervous System Test Questions 100% Solved(SCORED A)

The nervous system is divided into ____ parts - ANSWER 2 Central Nervous System (CNS) - ANSWER Consists of the brain and spinal cord Peripheral Nervous System (PNS) - ANSWER Consists of all the nerves not found in the brain or spinal cord Neurons - ANSWER Cells responsible for receiving, transmitting, and processing impulses in various parts of the body Sensory Neurons (afferent) - ANSWER Transmit impulses from receptors or sense organs into the CNS Motor Neurons (efferent) - ANSWER Transmit impulses from the CNS (brain or spinal cord) to effectors such as muscles or glands; carry out desired response to the stimulus Interneurons - ANSWER Found only within the brain or spinal cord; process impulses from sensory neurons and send appropriate impulses to motor neurons Neuroglia - ANSWER Cells that surround and support neurons, provide some nourishment/blood supply and may play a role in transmitting impulses Schwann Cells - ANSWER Produce myelin, a lipid rich layer of membrane that protects neurons and increases the speed of impulses Astrocytes - ANSWER Star shaped cells that support and hold neurons together; they also have roles in metabolism, regulation of ion concentrations in nervous tissue, cleanup of cellular debris around neurons and other areas Oligodendrocytes - ANSWER Form myelin within the brain and spinal cord Types of neurons - ANSWER Sensory, motor, interneurons Types of neuroglia - ANSWER Schwann cells, astrocytes, Oligodendrocytes Cell body - ANSWER The main part of a neuron. Contains a large nucleus and nucleolus and most other organelles (including lots of mitochondria). Also contains glycogen for energy, lipids and other substances