Nervous tissue

Question 1

nissl bodies

Answer 1

clusters of free ribosomes and RER found in the neuronal soma

Question 2

neurofibrils

Answer 2

microtubule and neuro-filament units in the neuronal cytoskeleton

Question 3

axon collaterals

Answer 3

larger (tend to be fewer) axon branches

Question 4

terminal branches (of axon)

Answer 4

smaller (tend to be more) axon branches

Question 5

astrocytes

Answer 5

CNS
maintains BBB and chemical environment (neurotransmitter uptake)
provides nutrients/growth/plasticity

general supporting cells

Question 6

microglia

Answer 6

CNS
neural immune cells
- phagocytotic

Question 7

ependymal cells

Answer 7

CNS + PNS
line brain ventricles and central spinal cord for CSF production

ciliated cells
selectively permeable

Question 8

oligodendrocytes

Answer 8

CNS
myelination of CNS neurons
not limited to one axon per cell

Question 9

schwann cells

Answer 9

PNS
myelination of PNS neurons
limited to one axon per cell

Question 10

satellite cells

Answer 10

PNS
regulation of PNS neuron chemical environment

Question 11

brain tumour

Answer 11

mostly gliomas (cancerous glial cells) as neurons don’t divide

effect depending on region

Question 12

demyelination

Answer 12

leads to MS (CNS) and GBS (PNS)
- autoimmune conditions