| 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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