DP Biology (last assessment 2024)

Test builder »

Question 21M.2.SL.TZ1.4a

Select a Test
Date May 2021 Marks available [Maximum mark: 1] Reference code 21M.2.SL.TZ1.4a
Level SL Paper 2 Time zone TZ1
Command term Estimate Question number a Adapted from N/A
a.
[Maximum mark: 1]
21M.2.SL.TZ1.4a

Squid have been used for research on nerve impulses. The mechanism of nerve transmission in these animals is the same as that in humans. The image shows an oscilloscope trace from a nerve impulse in a squid’s giant axon.

[squid] Pixabay.

(a)

Estimate the resting potential for this axon.

[1]

Markscheme

−65 mV ✔

Unit required; minus sign required. Accept answers from −62mV to −65mV.

Syllabus sections