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Exam (elaborations)

NSCI 225 Exam 1 Questions & Answers 2024/2025

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  • NSCI 225
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  • NSCI 225

NSCI 225 Exam 1 Questions & Answers 2024/2025 2 categories of cells in the nervous system: - ANSWERS- neurons - glia _________ are the main cell type responsible for integration and relay of messages. - ANSWERSNeurons _________ are cells that support the neurons - ANSWERSGlia What ar...

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  • November 2, 2024
  • 6
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • NSCI 225
  • NSCI 225
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NSCI 225 Exam 1 Questions & Answers
2024/2025

2 categories of cells in the nervous system: - ANSWERS- neurons

- glia



_________ are the main cell type responsible for integration and relay of messages. - ANSWERSNeurons



_________ are cells that support the neurons - ANSWERSGlia



What are the two main types of neurons? - ANSWERS- projection neurons

- interneurons



Characteristics of Projection Neurons - ANSWERS- sensory, motor, tract

- only 10% of neuron population

- takes information from one place to another (inches up to feet away)

- largest and best studied



Characteristics of Interneurons - ANSWERS- 90% of neuron population

- modifies information within the local area (mm)

- small, difficult to study



CNS glial cell types (4) - ANSWERS- ependymal cells

- microglia

- astrocytes

- oligodendrocytes

, PNS glial cell types (2) - ANSWERS- schwann cells

- satellite cells



Characteristics of Astrocytes - ANSWERS- support cells, surround somas and contribute to blood brain
barrier (end feet on capillaries)

- most numerous

- controls extracellular environment (K+)

- Takes up neurotransmitters



Characteristics of Oligodendrocytes - ANSWERS- myelinates in CNS only

- myelinates more than one axon

- each axon requires more than one oligodendrocyte



Characteristics of Microglia - ANSWERS- clean up cells . . . phagocytosis

- not from same embryological source

- found in resting state

- respond to injury



Characteristics of Satellite cells - ANSWERS- supports cells around neurons in ganglia



Characteristics of Schwann cells - ANSWERS- myelinates all axons in the PNS

- can only myelinate 1 block for 1 axon



What is spina bifida? - ANSWERS- failure of fusion of vertebral arches at caudal end of neural tube



What is a meningocele? - ANSWERSwhen the meninges are exposed to outside of body



What is a meningomyelocele? - ANSWERSMeninges and neural components exposed to outside of body

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