- The diagram shows the brain mass and number of neurons in two rodents (agouti and capybara) and two primates (owl and capuchin monkeys).
diagram/table comparing brain mass and neuron numbers for agouti, capybara, owl monkey, and capuchin monkey
(a) Discuss whether the mass of the brain is proportional to the number of neurons. [2]
(b) Outline how the cerebral cortex is adapted to allow for large numbers of neurons. [2]
(c) State a function of
(i) Broca’s area; [1]
(ii) the medulla oblongata. [1]