112DT Nervous system Part 1

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  • Created by: Ellen
  • Created on: 27-03-14 16:29
Name 3 of the 7 structures of the Nervous system
Brain; Cranial Nerves; Spinal Cord; Spinal Nerves; Ganglia; Enteric Plexus; Sensory Receptors
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How many cranial nerves does the brain have?
12
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How many spinal nerve pairs does the spinal cord have?
31
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Which structure of the nervous system forms a connection between the Central Nervous System (CNS) and the Peripheral Nervous System (PNS)?
Ganglia
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Enteric Plexus is a network of neurons that serves the
Gut
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Dendrites of sensory neurones are known as
Sensory receptors
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Picture
Picture
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CNS is made up of which part of the body
Brain and spinal cord
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Spinal cord connects the brain to which nervous system
Peripheral Nervous System (PNS)
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White matter denotes the presence of
Mylinated AXONS
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Grey matter denotes the presence of
Unmylinated CELL BODIES
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What are the 3 functions of the nervous systems?
Sensory, Motor and Integrative (relay)
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The 3 sensory functions are?
Detection of internal stimuli; external stimuli; messages carried to brain or spinal cord
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The 3 Integrative (Relay) functions are?
Process sensory information; Stores information and decides response; Awareness of sensory stimuli in the brain
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The 2 motor functions are
Produce a response; Activates effectors i.e: muscles contract, glands secrete
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What are the 3 main catergories of sensory receptors
Mechanoreceptors (stretch, contraction); Chemoreceptors (taste, smell, monitor H+ O2 CO2); Radioreceptors (sight; temperature)
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4 things sensory receptors can detect?
Vibrations; Pressure; Temperature; Chemical Substances
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Some nerves are linked to surrounding tissues. If these nerves are damaged the around it will still function well. TRUE or FALSE
FALSE
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Where are the very short neurones located?
Brain
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How long can a neurone be?
1.5m
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Do ALL neurones contain the usual cell organelles?
Yes
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Which cells produce the insulating fatty layer or myelin?
The Schwann cells
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Picture
Picture
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Do afferent neurones have sensory, motor or integrative functions
Sensory
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Do efferent neurones have sensory, motor or integrative functions
Motor
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Afferent neurons have the cell body proturding from the middle of the neurone. TRUE or FALSE
TRUE
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Are the signals to the brain carried by the afferent or the efferent neurones
Afferent
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Are the signals from the brain or spinal cord to the tissues afferent or efferent?
Efferent
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Is it afferent or efferent neurones that alter tissue functions?
Efferent
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What are the 3 subdivisions of the PNS?
Somatic NS; Autonomic NS; Enteric NS
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Will the parasympathetic NS increase or decrease the heart rate?
Decrease
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Other cards in this set

Card 2

Front

How many cranial nerves does the brain have?

Back

12

Card 3

Front

How many spinal nerve pairs does the spinal cord have?

Back

Preview of the front of card 3

Card 4

Front

Which structure of the nervous system forms a connection between the Central Nervous System (CNS) and the Peripheral Nervous System (PNS)?

Back

Preview of the front of card 4

Card 5

Front

Enteric Plexus is a network of neurons that serves the

Back

Preview of the front of card 5
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