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Question 18M.3.HL.TZ1.5b

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.3.HL.TZ1.5b
Level HL Paper 3 Time zone TZ1
Command term Suggest Question number b Adapted from N/A
b.
[Maximum mark: 1]
18M.3.HL.TZ1.5b
(b)

The brain requires a large energy input. Suggest one reason for this.

[1]

Markscheme

a. brain cells/neurons carry out large amount of metabolic activity 

b. maintenance of resting potential requires energy/ATP
OR
functioning of Na-K pumps requires energy/ATP

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