Flashcards in Nervous System Cells Deck (28):
What structures does the CNS consist of?
Brain and Spinal Cord
What structures does the PNS consist of?
Cranial and Spinal Nerves
What division of the nervous system consists of all the incoming sensory pathways?
What division of the nervous system consists of all the outgoing motor pathways?
What effectors do the ANS pathways carry information to?
What are examples of visceral effectors?
What are the two division of the ANS?
Sympathetic and Parasympathetic
What are the two main types of cells that compose the nervous system?
neurons and glia
Which of the two main types of cells that compose the nervous system are excitable and conduct impulses?
Which of the two main types of cells that compose the nervous system provide support?
Which cells of the nervous system are more prone to benign and malignant tumors?
Glia - they retain their capacity for cell division throughout adulthood
What are the five types of glia?
Which of the types of glia cells can be found in the PNS?
Schwann - the others are found in the CNS
What are the largest and most numerous types of glia?
Which type of glia helps form the blood-brain barrier?
Which type of glia carry on phagocytosis?
What type of glia resemble epithelial cells and form thin sheets that line fluid-filled cavities in the brain and spinal cord?
What type of glia produce the fatty myelin sheath around nerve fibers in the CNS?
What type of glia support nerve fibers and sometimes form a myelin sheath around peripheral nerves?
What term describes the microscopic gaps between adjacent Schwann cells that make up the myelin sheath?
nodes of Ranvier
What term describes the Schwann cells nucleus and cytoplasm as they are squeezed to the perimeter as the Schwann cell wraps around an axon of a neuron?
What is another term used to describe Schwann cells?
What are the two major layers of a Schwann cell that is wrapped around the axon of a neuron?
Neurilemma and Myelin sheath
What parts does a neuron consist of?
What part of the neuron receive stimuli and conduct electrical signals toward the cell body?
What is the tapered portion of a neuron's cell body?
What are the distal ends of axon branches?