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Excitable Cells > Cells Of NS > Flashcards

Cells Of NS Flashcards

1
Q

What is the hierarchical structure of the brain?

A

Molecules, Cells, Circuits - Systems, Behaviour, Cognition

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2
Q

Who proposed the reticular theory?

A

Camillo Golgi

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3
Q

What did Golgi believe about neurites?

A

That they were fused together to form a network

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4
Q

What is the neuron doctrine?

A

Each neuron is a discrete cell

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5
Q

What are the two principles of the neuron doctrine?

A
  • Principle of dynamic polarisation
  • Principle of connectional specificity
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6
Q

What advancement confirmed the existence of synapses?

A

Development of the electron microscope

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7
Q

What is a disadvantage of using an electron microscope?

A

Cells are fixed, i.e., dead

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8
Q

What technique uses tagged antibodies to visualize proteins in tissue?

A

Immunofluorescence labelling methods

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9
Q

What is the resolution of an electron microscope?

A

0.1 nm

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10
Q

What is the primary role of glia in the nervous system?

A

To support neurons

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11
Q

How do glia outnumber neurons in the thalamus?

A

17:1

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12
Q

What are astrocytes and their role?

A

Star-shaped glial cells that regulate the composition of extracellular fluid

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13
Q

What is the function of oligodendrocytes?

A

Myelinate axons in the CNS

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14
Q

What do Schwann cells do?

A

Myelinate a single axon in the PNS

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15
Q

What do ependymal cells produce?

A

Cerebrospinal fluid (CSF)

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16
Q

What is the function of microglia?

A

Act as immune scavengers in the brain

17
Q

What is a unique feature of neuronal cells?

A

They cannot divide

18
Q

What are the two types of processes in a neuron?

A
  • Dendrites
  • Axons
19
Q

What is the primary function of dendrites?

A

Specialized for receipt of information

20
Q

What is the primary function of axons?

A

Specialized for transmission of information

21
Q

What are the main cytosolic organelles found in neurons?

A
  • Peroxisomes
  • Mitochondria
  • Ribosomes
  • Endoplasmic reticulum
  • Golgi complex
22
Q

What is the role of the neuronal cytoskeleton?

A
  • Structural support
  • Transport cargo
  • Tethering components
23
Q

What are the three types of neuronal classification based on structure?

A
  • Unipolar
  • Bipolar
  • Multipolar
24
Q

What are the two functional classifications of neurons?

A
  • Sensory (afferent) neurons
  • Motor (efferent) neurons
  • Interneurons
25
Q

True or False: Neurons can divide.

A

False

26
Q

Fill in the blank: The _______ are the supporting cells in the nervous system.

A

glia

Excitable Cells (6 decks)

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