Question 20N.3.HL.TZ0.4a
| Date | November 2020 | Marks available | [Maximum mark: 2] | Reference code | 20N.3.HL.TZ0.4a |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Describe | Question number | a | Adapted from | N/A |
The image on the left shows a developing neuron on the first day of culture (day 1). The image on the right shows the same neuron after one day (day 2).
[Source: The establishment of polarity by hippocampal neurons
in culture, CG Dotti, CA Sullivan and GA Banker, Journal of Neuroscience 1 April 1988, 8 (4) 1454–1468;
DOI: https://doi.org/10.1523/JNEUROSCI.08-04-01454.1988, Copyright ©1988 Society for Neuroscience.]
Describe the changes occurring in this neuron from day 1 to day 2.
[2]
a. branches (of dendrites/axons) formed
OR
new/more dendrites formed;
b. dendrites/axons grow/get longer;
Many candidates could describe at least one change occurring, but many used terminology for processes occurring at later stages that were not shown on the photographs.
