Friedman-Nervous System Flashcards

1
Q

Classification of nervous system (2)

A

Central nervous system (cns) & Peripheral nervous system (pns)

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2
Q

Central nervous system (CNS) consists of…

A

brain & spinal cord

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3
Q

Peripheral nervous system (PNS) consists of..

A

mainly nerves through out the body that send and receive signals from CNS

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4
Q

Fuctional classification of PNS (2)

A
  1. sensory (afferent) division & 2. Motor (efferent) division
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5
Q

afferent

A

sensory division of PNS

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6
Q

efferent

A

motor division of PNS

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7
Q

Sensory (afferent) division (PNS) consists of…

A

-neurons that deliver nerve impulses TO CNS & is located in every part of the body (ex. skeletal, skin, muscles, heart, etc.)

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8
Q

Motor (efferent) division (PNS) consists of…

A

Neurons that carry signals FROM CNS to all parts of body (ex. skeletal, smooth, and cardiac muscles, glands)

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9
Q

Classification of motor division of PNS (2)

A
  1. Somatic nervous system & 2. Autonomic nervous system
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10
Q

Somatic Nervous system (motor neurons of PNS)

A

control skeletal muscles & voluntary movement

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11
Q

Autonomic nervous system (motor neurons of PNS)

A

controls smooth/cardiac muscle and glands & involuntary movements (ex. heart, digestive, thyroid)

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12
Q

classification of autonomic nervous system (2)

A
  1. sympathetic & 2. parasympathetic
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13
Q

Sympathetic (autonomic nervous system)

A

activated during digestion & body is relaxed allowing for digestion

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14
Q

Parasympathetic (autonomic nervous system)

A

activated during fight or flight response - high level of awareness which takes away from digestive system

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15
Q

cells of nervous system

A

supporting cells & main cells (neurons)

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16
Q

supporting cells of the nervous system

A

oligodendrites & schwann cells

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17
Q

oligodendrites (supporting cells of nervous system)

A

associated with CNS & creates myelin sheath

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18
Q

Schwanna cells (supporting cells of nervous system)

A

associated with PNS & creates myelin sheath

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19
Q

Myeline sheath

A

fatty insulation covering cells- helps with insulation and creating a strong nerve impulse

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20
Q

neurons

A

Main cells- aka nerve cells, transmits messages between neurons or other parts

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21
Q

structure of a neuron (2)

A

cell body & processes

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22
Q

processes of neuron

A

dendrites & axons

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23
Q

Neuron-cell body

A

metabolic center of the cell that contains nucleus and many organs - integrates incoming signals and generates outgoing signal to axon

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24
Q

neuron-dendrites

A

convey incoming messages to the cell body - has many branches

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25
neuron-axon
generates nerve impulses & conducts them away from the cell body (has myelin sheath) - passes electrical signals to dendrites of another sell or to an effector cell
26
interneurons
connects motor (efferent) and sensory (afferent) neurons-cell body is in CNS
27
Neuron claffication: structure (3)
1.Bipolar 2.mulitpolar 3.unipolar
28
two extensions from the cell body & one is axon (neuron structure)
bipolar
29
many extensions from the cell body & one is axon; rest all dendrites (neuron structure)
multipolar
30
only one extension from the cell body (neuron structure)
unipolar
31
two neuron reflex
(knee jerk) faster reflexes-mostly dealt with in spinal cord
32
3 neuron reflex
involves interneurons-slower reflexes since it involves more neurons (ex. walking or touching something sharp)
33
2 cerebral hemispheres
cortex & internal white matter
34
gray matter is...
cortex
35
cortex is in responsible for...
speech, memory, logic, & emotion
36
anatomy of cortex (5)...
1. frontal 2.parietal 3.occipital 4.temporal 5.insula (deep within brain)
37
deep sulcus in brain is..
fissure
38
egg shaped structure which acts as relay station for info coming to brain into cortex
thalamus
39
thalamus receives info from afferent or efferent nervous impulses?
afferent
40
thalamus controls... (2)
emotions & visceral function from hypothalamus
41
gateway to cerebral cortex
thalamus
42
essential for body homeostasis
hypothalamus
43
control autonomic nervous system
hypothalamus
44
initial physical responses to emotions (pleasure, fear, rage)
hypothalamus
45
regulates body temp.
hypothalamus
46
regulates food and water intake (feeling thirsty or hungry)
hypothalamus
47
regulate sleep-wake cycles: biological clock
hypothalamus
48
cerebrovascular accident
stroke
49
stroke
blood circulation to an area of brain is block and brain tissue dies causing paralysis of opposite side of the body.
50
alteration in brain function as result to blow to the head
cuncussion
51
serious concussion cause brain bruising
contusion
52
simple reflex arcs
2 neurons
53
ACH
neuro transmitters
54
bleeding from a ruptured vessel into the intracranial space causing compression of brain tissue
subdural hemorrhage
55
subdural hemorrhage
as blood is accumulated > loss of speech > conciousness > loss of control of blood pressure heart rate and respiration
56
subdural hemorrhage-how to fix
drill hole to remove blood and fix the raptured blood valve
57
degenerative brain disease causes memory loss & short attention span
alzheimers disease
58
alzheimers disease cause...
protein plaques build up in the brain slowly kill neurons, slow spread that create various stages of the disease
59
degradation of cerebral cortex caused by accumulation of mutant huntington protein
huntington's disease
60
huntington's disease causes
flapping movements-jerky wild motions & mental detrition in later stages
61
gryus
ridges on the surface of cerebral cortex (bumps)
62
sulcus or fissures
deep creases on the cerebral cortex (divides cortex to individual lobes)
63
Nervous system functions (3)
1.receives sensory input 2.CNS processes & integrates info (sums it up) 3.CNS generates motor output
64
cells that transmit nerve impulses between parts of the nervoys system
neurons
65
supports and nourishes neurons...
neuroglia (or glial cells)