Brain functions consist of which components?

• A. Sensory, perception, memory, motor
• B. Input, integration, memory, output
• C. Language, memory, attention, planning
• D. Stimulus, processing, response, feedback

Answer: (B)

Think of brain functions as a flow of information: something comes in as input, the brain integrates and analyzes it, memory stores and can retrieve relevant knowledge, and a response or action comes out as output. The option that lists input, integration, memory, and output fits this sequence exactly. It describes the full processing cycle—from receiving signals, to interpreting and deciding, to using stored knowledge, to producing a response.

For example, when you read, input is the visual signals from the words, integration is decoding and linking them to meaning, memory brings in prior vocab and knowledge, and output is speaking or writing your understanding. The other options mix in components that are parts of cognition or describe feedback or separate domains rather than a clear flow from intake to action, so they don’t capture the full processing sequence as neatly.