IELTS Reading detail Practice
An inadequate supply of iron during infancy can negatively impact the creation of ..., the chemical messengers used by the brain's nerve cells.
Question type: sentence completion · Difficulty: intermediate
- A. hormones
- B. neurotransmitters
- C. synaptic connections
- D. neuronal membranes
Explanation Preview
Paragraph C explains the role of iron in the brain. It says, 'It is a critical component of enzymes responsible for producing neurotransmitters—the chemical messengers that allow neurons to communicate.' This directly links iron to the production of neurotransmitters.