Lab Quiz #9 Material (04/03/2025) Flashcards
This organ system enables the body to respond to changes in its external environment and controls the functions of internal organs and systems.
What is the nervous system?
This ANATOMICAL division of the nervous system includes the brain and spinal cord.
What is the central nervous system (CNS)?
This ANATOMICAL division of the nervous system includes peripheral nerves, cranial nerves, and ganglia.
What is the peripheral nervous system (PNS)?
This FUNCTIONAL division of the nervous system is under conscious voluntary control.
What is the somatic nervous system (SNS)?
This FUNCTIONAL division of the nervous system is under involuntary control.
What is the autonomic nervous system (ANS)?
List the 3 subdivisions of the autonomic nervous system (ANS).
1) Sympathetic
2) Parasympathetic
3) Enteric
This subdivision of the autonomic nervous system (ANS) serves the alimentary canal and regulates the function of internal organs by innervating smooth and cardiac muscle cells as well as glandular epithelium.
What is the enteric division?
What are the 2 main types of peripheral neuroglia?
Schwann & satellite cells
In MYELINATED nerves, {…} cells produce the {…} sheath from compacted layers of their own cell membranes that are wrapped concentrically around the nerve cell process.
1) Schwann
2) Myelin
This junction found between 2 adjacent Schwann cells is the site where the electrical impulse is regenerated for high-speed propagation along the axon.
What is the node of Ranvier?
In UNMYELINATED nerves, nerve processes are enveloped in the cytoplasm of these cells.
What are Remak Schwann cells?
These cells maintain a controlled microenvironment around the nerve cell bodies in the ganglia of the peripheral nervous system (PNS).
What are satellite cells?
This type of central neuroglial cell provides physical and metabolic support for neurons of the CNS.
What is an astrocyte?
This type of central neuroglial cell produces and maintains the myelin sheath in the CNS.
What is an oligodendrocyte?
This type of central neuroglial cell possesses phagocytotic properties and mediates neuroimmune reactions.
What is a microglia?
This type of central neuroglial cell forms the epithelial-like lining of the ventricles of the brain and spinal cord.
What is an ependymal cell?
This principal type of nerve tissue cell consists of specialized cells that conduct impulses.
What are neurons?
This principal type of nerve tissue cell consists of nonconducting cells in close proximity to nerve cells (neurons) and their processes.
What are supporting cells?
The structural and functional unit of the nervous system is called this.
What is the neuron (nerve cell)?
Do neurons divide?
NO
In certain brain regions, these cells may divide and differentiate into new neurons.
What are neural stem cells?
This type of neuron carries impulses from receptors to the CNS.
What is the sensory neuron?
This type of neuron carries impulses from the CNS or ganglia to effector cells.
What is the motor neuron?
This type of neuron communicates between sensory and motor neurons.
What is the interneuron?