nervous system

Question 1

neuroglia

Answer 1

major supporting cells of neurons
6 types

Question 2

neuron

Answer 2

basic structural and functional unit of nervous system
based structure/ function

Question 3

nerve

Answer 3

bundle of axons/ nerve fibres and their sheaths

Question 4

function NS

Answer 4

receive internal/external sensory input
integrate info - make sense
motor output
maintain homeostasis
establish & maintain mental activity - thinking, memory

Question 5

ganglia PNS

Answer 5

collection of neuron bodies outside CNS

Question 6

plexuses PNS

Answer 6

extensive network of axons outside CNS

Question 7

enteric ns

Answer 7

within wall of digestive system
sensory neuron connect DT to CNS
ANS motor neuron connect CNS digestive tract
enteric neurons confined to enteric plexuses
-stimulate SM, gland secretion, -detect change content lumen

Question 8

sympathetic

Answer 8

shorter neuron pathway - quicker response
thoracic-lumbar region

Question 9

parasympathetic

Answer 9

crania-sacral region
longer neuron pathway - slower response

Question 10

axon trigger zone

Answer 10

axon hillock (cone shape, soma–> axon) + initial segment
start action potential

Question 11

multipolar

Answer 11

motor & interneuorns
one cell body
many dendrite
axon

Question 12

bipolar

Answer 12

once cell body one dendrite one axon
specialised sensory enurons
retina or eye, nasal cavity

Question 13

unipolar (pseudo)

Answer 13

one cell body
dendrite connect axon
sensory neuorns

Question 14

astrocytes

Answer 14

neuroglia CNS
star shaped
highly branched cytoplasmic processes w end feet
synaptic support, scaffold CNS cells & capillaries

Question 15

ependymal cells

Answer 15

line ventricle brain central canal spinal cord
production regulation CSF
ciliation simple cuboidal & columnar
neuroglia CNS

Question 16

microglial

Answer 16

neuroglia CNS
immune system
smallest - oval
becomes phagocytic response inflammation

Question 17

oligodendrocytes

Answer 17

neuroglia CNS
wrap around myelin sheath
multiple sheath??

Question 18

schwann cells

Answer 18

neuroglia PNS
form myelin sheath
one cell per axon

Question 19

satellite cell

Answer 19

neuroglia PNS
surround nueron cell body
provide support & nutrition
protect heavy metal poison

Question 20

grey matter

Answer 20

peripheral brain, centre spine
cell bodies, axon terminal - most crap

Question 21

white matter

Answer 21

myelinated axons
inner brain, outer spine

Question 22

spine ***

Answer 22

posterior anterior lateral horn
dorsal ventral lateral column
sulcus fissure

Question 23

sensory -dorsal
motor - ventral