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Question 18N.3.SL.TZ0.b

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.SL.TZ0.b
Level SL Paper 3 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 2]
18N.3.SL.TZ0.b

The drawings show the development of an immature neuron in a rat.

Outline the possible changes to this neuron that could happen during the subsequent development of the nervous system.

[2]

Markscheme

a. the neuron forms synapses/multiple connections «with other neurons»
OR
a neural network forms
OR
more dendrites ✔

b. some synapses/connections in excess of what is required
OR
some synapses/connections not used ✔

c. it could be removed by neural pruning/apoptosis ✔

d. it could migrate to another place ✔

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