The Brain (Edexcel International A Level (IAL) Biology): Exam Questions

Exam code: YBI11

9 mins1 question
1a
2 marks

The brain is responsible for processing information and coordinating responses.

The diagram shows a human brain.

Three regions of the brain have been labelled.

edexcel-ial-unit-5-jan-2021-q3a

Complete the table with the name and function of each region.

Label

Name of the region

Function of the region

P

medulla oblongata

 

Q

 

 

R

 

balance and coordinating movement

1b
4 marks

Seizures in the brain can be investigated using different imaging techniques.

(i) Which one of the following statements is correct?

(1)

☐ A CT scans are produced by the absorbance of magnetic fields
☐ B CT scans are produced by the absorbance of radio waves by deoxyhaemoglobin
☐ C CT scans produce a cross-sectional image of a thin slice through the body
☐ D CT scans can be used to study brain activity while a person is undertaking tasks

(ii) During a seizure, part of the brain will be overactive.

Describe how positron emission tomography (PET) could be used to identify the part of the brain involved.

(3)

1c
3 marks

Some seizures can result in an increase in body temperature.

Suggest how a seizure in part of the brain could lead to an increase in body temperature.