| Date | November 2021 | Marks available | 1 | Reference code | 21N.1.SL.tz0.15 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 15 | Adapted from | N/A |
Question
The diagram shows a motor unit. What structure is labelled X?
A. Dendrite
B. Axon
C. Cell body
D. Synapse
Markscheme
D
Examiners report
A number of candidates wrongly selected options A and B. It is a small component of the course but easy enough to recall for most.
Syllabus sections
- 17N.1.SL.tz0.15: Which is the correct sequence of neural impulse transmission to the muscle? A. cell body →...
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18N.1.SL.tz0.15:
What is the structure labelled X in the diagram below?
[Source: Designua/Shutterstock]
A. Axon
B. Muscle
C. Dendrite
D. Cell body
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22M.1.SL.tz0.15:
The diagram shows a motor unit. In which area does the neurotransmitter acetylcholine act?
[Source: Designua / Shutterstock.]
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20N.1.HL:.tz0.12:
The diagram shows a motor unit. What is the structure labelled X?
[Source: By Designua / Shutterstock.]
A. Axon
B. Nucleus
C. Cell body
D. Dendrite
