Nervous System (Lecture and Laboratoty) Flashcards

1
Q

bundle of many axons
that connects the CNS to sensory
receptors, muscles and glands

A

nerve

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2
Q

how many pirs of cranial nerves and spinal nerves?

A

12 pairs of Cranial Nerves
31 pairs of Spinal Nerves

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3
Q

collection of neuron
cell bodies located outside the
CNS

A

ganglion

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4
Q

what is the main division of the nervous system?

A

CNS - Central nervous system
PNS - peripheral nervous system

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5
Q

peripheral nervous system is divided into

A

sensory division (afferent division)
motor division (efferent division)

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6
Q

conduct action
potentials from
sensory receptors
to the CNS

A

sensory division

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7
Q

conduct action
potentials from
CNS to effector
organs (muscles
or glands

A

motor division

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8
Q

motor division (efferent division) is divided into

A

somatic nervous system
autonomic nervous system

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9
Q

transmits action
potentials from the
CNS to skeletal
muscles

A

somatic nervous system

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10
Q

autonomic nervous system is divided into

A

sympathetic nervous system
parasympathetic nervous system

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11
Q

transmits action potentials
from the CNS to cardiac
muscle, smooth muscle,
and glands

A

autonomic nervous system

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12
Q

what are the cells of the nervous system?

A

neurons
glial cells

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13
Q

Receive stimuli, conduct action
potentials, and transmit signals to other neurons or effector organs

A

neurons (nerve cells)

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14
Q

what are the 3 parts of the neurons

A
  • cell body
  • dendrites
  • axons
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15
Q
  • contains a nucleus - source of
    information for gene expression
  • rough ER, golgi apparatus,
    mitochondria
A

cell body

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16
Q
  • short, highly branching
    cytoplasmic extensions
  • receives stimulus from other
    neurons or sensory receptors
17
Q
  • a single long process extending
    from the neuron cell body
  • transmits stimulus to a gland,
    muscle, organ, or other neuro
18
Q

area where the axon
leaves the neuron cell
body

A

axon hillock

19
Q

conduct action potentials
towards the CNS

A

axon of sensory neurons

20
Q

conduct action potentials
away the CNS

A

axon of motor neurons

21
Q

types of neurons base on functional classifications

A

Sensory Neurons
Motor Neurons
Interneurons

22
Q

types of neurons base on structural classification

A

multipolar
bipolar
pseudo-unipolar

23
Q

*many dendrites and a single axon
*most CNS and most motor neurons

A

multipolar

24
Q

*have 2 processes (one dendrite and one axon)
*some sensory organs (Eye and nasal cavity)

25
*single processes extending from cell body *one axon and dendrite-like receptors *most sensory neurons
pseudo-unipolar
26
protective wrapping around brain and spinal cord
meninges
27
28
specialized wrapping around axons
myelin sheath
29
gaps in myelin sheath where action potentials develop
nodes of ranvier
30
nerve tissue exists as?
gray or white matter
31
consist of group of neuron cell bodies and their dendrites
gray matter
32
consist of bundles of parallel axons and their myelin sheaths, which are whitish in color
white matter
33
inferior end of the spinal cord; spinal nerves exiting there resemble a horse’s tail
Cauda equina
34
where neurons of several spinal nerves come together and intermingle
plexuses