The _____ part of the spinal cord transmits messages to and from the brain. The _____ part controls life-saving reflexes.

• A. upper; lower
• B. lower; upper
• C. outer; inner
• D. inner; outer

Answer: (C)

Verified step by step guidance

1. Understand the structure of the spinal cord: The spinal cord is divided into different regions, each with specific functions.
2. Identify the function of the outer part of the spinal cord: The outer part, known as the white matter, primarily consists of myelinated axons that transmit messages to and from the brain.
3. Identify the function of the inner part of the spinal cord: The inner part, known as the gray matter, contains neuron cell bodies and is responsible for processing information, including controlling reflexes.
4. Recognize the role of reflexes: Reflexes are automatic responses to stimuli that are crucial for survival, such as pulling away from a hot surface.
5. Match the functions to the correct parts: The outer part of the spinal cord is responsible for transmitting messages, while the inner part controls life-saving reflexes.