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Date May 2017 Marks available 2 Reference code 17M.3.HL.TZ1.4
Level Higher level Paper Paper 3 Time zone Time zone 1
Command term Outline Question number 4 Adapted from N/A

Question

Outline the development of axons in immature neurons.

[2]
b.

State one activity controlled by the medulla oblongata.

[1]
e.

Markscheme

a. axon grows from an «immature» neuron 

b. chemical stimuli trigger the growth/direction of axon 

c. only one axon develops per neuron 

d. some axons extend beyond neural tube to reach other parts of body

b.

gut muscles / heart rate/cardiac centre / vasomotor / breathing/ventilation rate / reflex centre of vomiting/coughing/sneezing/swallowing

e.

Examiners report

[N/A]
b.
[N/A]
e.

Syllabus sections

Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics) » A.1 Neural development
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Option A: Neurobiology and behaviour » Option A: Neurobiology and behaviour (Core topics)
Option A: Neurobiology and behaviour

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