L16 Cells and Organisation of the Nervous System

Descripción

• Name the five main types of glial cells and their functions, and contrast these with neuronal structure and function • Describe the structure of a neuron, and understand how it is specialised for conduction of nerve impulses • Describe how the electrical nerve impulse changes to a chemical signal at the synapse • Understand the directions of information flow in the nervous system
Mer Scott
Test por Mer Scott, actualizado hace más de 1 año
Mer Scott
Creado por Mer Scott hace más de 7 años
18
1

Resumen del Recurso

Pregunta 1

Pregunta
Glia are [blank_start]support[blank_end] for the nervous system. There are 4 types in the [blank_start]CNS[blank_end], and 1 type in the [blank_start]PNS[blank_end]. These types are highly specialised for [blank_start]different[blank_end] functions. Neurons are cells specialised for [blank_start]transport[blank_end] of information. They can transmit [blank_start]many[blank_end] types of information, and there are [blank_start]thousands[blank_end] of types of neurons!
Respuesta
  • support
  • CNS
  • PNS
  • different
  • similar
  • transport
  • storage
  • many
  • 5
  • thousands
  • hundreds

Pregunta 2

Pregunta
Which cell of the CNS provides nutrients to neurons and ensheaths blood capillaries?
Respuesta
  • Astrocyctes
  • Oligodendrocytes
  • Ependymal cells
  • Microglia

Pregunta 3

Pregunta
What is the role of microglia?
Respuesta
  • To engulf microorganisms and debris, acting as immune cells for the neurons.
  • To supply nutrients to cells and ensheath blood capillaries.
  • To circulate the CSF.
  • To support and ensheath neurons.

Pregunta 4

Pregunta
Ependymal cells have cilia and line fluid filled cavities in the brain and spinal cord.
Respuesta
  • True
  • False

Pregunta 5

Pregunta
In the PNS the axons are sheathed by oligodendrocytes. In the CNS they are myelinated by Schwann cells.
Respuesta
  • True
  • False

Pregunta 6

Pregunta
The axon hillock precedes the summation zone.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
Which type of synapse is most common in the CNS?
Respuesta
  • Axodendritic
  • Axosomatic
  • Axoaxonic
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