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Flashcards in Nervous System Cells Deck (28):
1

What structures does the CNS consist of?

Brain and Spinal Cord

2

What structures does the PNS consist of?

Cranial and Spinal Nerves

3

What division of the nervous system consists of all the incoming sensory pathways?

Afferent division

4

What division of the nervous system consists of all the outgoing motor pathways?

Efferent division

5

What effectors do the ANS pathways carry information to?

visceral/autonomic effectors

6

What are examples of visceral effectors?

smooth muscles
cardiac muscles
glands
adipose tissue

7

What are the two division of the ANS?

Sympathetic and Parasympathetic

8

What are the two main types of cells that compose the nervous system?

neurons and glia

9

Which of the two main types of cells that compose the nervous system are excitable and conduct impulses?

Neurons

10

Which of the two main types of cells that compose the nervous system provide support?

Glia

11

Which cells of the nervous system are more prone to benign and malignant tumors?

Glia - they retain their capacity for cell division throughout adulthood

12

What are the five types of glia?

Astrocytes
Microglia
Ependymal
Oligodendrocytes
Schwann Cells

13

Which of the types of glia cells can be found in the PNS?

Schwann - the others are found in the CNS

14

What are the largest and most numerous types of glia?

Astrocytes

15

Which type of glia helps form the blood-brain barrier?

Astrocytes

16

Which type of glia carry on phagocytosis?

Microglia

17

What type of glia resemble epithelial cells and form thin sheets that line fluid-filled cavities in the brain and spinal cord?

Ependymal cells

18

What type of glia produce the fatty myelin sheath around nerve fibers in the CNS?

Oligodendrocytes

19

What type of glia support nerve fibers and sometimes form a myelin sheath around peripheral nerves?

Schwann cells

20

What term describes the microscopic gaps between adjacent Schwann cells that make up the myelin sheath?

nodes of Ranvier

21

What term describes the Schwann cells nucleus and cytoplasm as they are squeezed to the perimeter as the Schwann cell wraps around an axon of a neuron?

neurilemma

22

What is another term used to describe Schwann cells?

neurolemmocytes

23

What are the two major layers of a Schwann cell that is wrapped around the axon of a neuron?

Neurilemma and Myelin sheath

24

What parts does a neuron consist of?

Cell body(perikaryon)
Axon
Dendrites

25

What part of the neuron receive stimuli and conduct electrical signals toward the cell body?

Neurons

26

What is the tapered portion of a neuron's cell body?

axon hillock

27

What are the distal ends of axon branches?

telodendria

28

Whats contained in synaptic knobs?

mitochondria and vesicles