32 Questions
What are the two main anatomical parts of the nervous system?
Central nervous system and peripheral nervous system
What is the function of neurons?
To transmit nerve impulses and control the function of different organs
What is the term for a flask-shaped neuron with only one process?
Pseudounipolar neuron
What is the function of sensory neurons?
To carry sensations from the skin to the CNS
What is found in the cytoplasm of the perikaryon?
Nissel's granules, Golgi apparatus, and microtubules
What is the function of interneurons?
To associate with other neurons
What is the term for a neuron with several processes?
Multipolar neuron
What is the region of the axon where Nissel's granules are absent?
Axon hillock
What is the main function of the cell body of a neuron?
To provide nutrients and support
Where are Nissil's granules typically found?
Only in the cell body
What is the main component of the myelin sheath?
Lipid
What is the function of Schwann cells in the peripheral nerve?
To form the myelin sheath
What is the characteristic shape of nerve cell bodies in the sympathetic ganglion?
Star-shaped and multipolar
What is the characteristic of the nerve cell bodies in the spinal ganglion?
Arranged in groups
What is the external sheath of dense CT that surrounds the nerve trunk?
Epineurium
What is the characteristic of the nerve fibers that surround the spinal ganglion?
Thin and non-myelinated
What is the function of astrocytes?
To support neurons and blood vessels
Which type of cells are responsible for forming myelin sheath in CNS?
Oligodendrocytes
What is the function of microglia?
To act as phagocytic cells
What is the shape of astrocytes?
Star shape with branched processes
What is the function of ependymal cells?
To line the cavities of brain and central canal of spinal cord
What type of ganglia is associated with the autonomic nervous system?
Autonomic (motor) ganglia
What type of nerve cells are found in Cranio-Spinal (sensory) ganglia?
Pseudo unipolar nerve cells
What is a group of nerve cell bodies called?
Ganglion
What is the primary function of the cell body (perikaryon) in neurons?
To conduct nerve impulses to other neurons
What do dendrites contain?
Nissel's granules and neurofilaments
Which type of sheath surrounds the axon and is interrupted by nodes of Ranvier?
Myelin sheath
In the CNS, what do groups of nerve fibers form?
Tracts
What is the name of the connective tissue sheath that surrounds individual nerve fibers?
Endoneurium
What stains the myelin sheath and makes it appear as a black circle in the section?
Osmic acid
Which cell organelles are lacking in the axoplasm of an axon?
Nissel's granules
What is the significance of the peri neurium?
Surrounds each bundle of nerve fibers
Learn about the anatomy and structure of nervous tissue, including the central and peripheral nervous systems, neurons, and neuroglial cells. Understand the different types of neurons and their functions.
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