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Lecture notes

List of key words with definitions

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A glossary of all the key words within the topic of The Nervous system. The Key words are highlighted in Pink alongside a detailed description/definition. For example: Neuroglia = They support, nourish and protect the neurons & maintain interstitial fluid, bathing the neurons I recommend...

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  • August 8, 2023
  • 3
  • 2023/2024
  • Lecture notes
  • Dr kirtsi newton
  • All classes
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Available practice questions

Flashcards 45 Flashcards
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Some examples from this set of practice questions

1.

What does the CNS consist of?

Answer: The brain and the Spinal Cord

2.

What does the PNS consist of?

Answer: - Cranial Nerves - Spinal Nerves - Ganglia - Enteric Plexuses - Sensory Receptors

3.

What does PNS stand for?

Answer: Peripheral Nervous System

4.

What are the roles of Neuroglia?

Answer: - Support, Nourish and Protect the neurons - Maintain Interstitial fluid, bathing the neurons

5.

What are Nissl Bodies?

Answer: Clusters of RER (rough endoplasmic reticulum) and free ribosomes

6.

What is a Telodendria?

Answer: Where the axon and collaterals end

7.

What are collaterals?

Answer: Branches of the axon

8.

What does the axon contain?

Answer: Axoplasm

9.

What Is the role of the myelin sheath?

Answer: Insulate the axon to increase speed of conduction

10.

Briefly describe the structure of a Multipolar Neuron

Answer: 1 Axon and many Dendrites

The Nervous System


Glossary
CNS (Central Nervous System) = Brain & Spinal Cord
PNS (Peripheral Nervous System) = Cranial Nerves, Spinal Nerves, Ganglia,
Enteric plexuses and sensory receptors
Neurons = Responsible for main nervous system functions
Neuroglia = They Support, nourish and protect the neurons & maintain
interstitial fluid bathing the neurons
Nissl Bodies = Clusters of RER & free ribosomes
Telodendria = Where the axon and collaterals end
Collaterals = Branches of the axon
Axon = Contains axoplasm and capable of an action potential
Myelin Sheath = Insulates the axon to increase speed of conduction
Multipolar Neurons = Neurons with 1 axon and many dendrites
Bipolar Neurons = Neurons with 1 axon and 1 main dendrite
Unipolar Neurons = Neurons that start as bipolar neurons, but the axon
and dendrites fuse into a single process
Astrocytes = Maintain chemical environment for an action potential,
provide nutrients to neurons & form part of the blood-brain barrier
Oligodendrocytes = Support network around CNS neurons & produce
myelin sheath
Microglia = Protects the CNS cells from disease by phagocytes & migrate
to areas of injury
Ependymal Cells = Produce & help circulate cerebral spinal fluid
Satellite Cell = Structural support & regulates exchange between cells and
interstitial fluid

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