Chapter 1 – What are the origins of Brain and Behaviour? 1. Brain abnormalities can be related to: A) 500 disorders. B) 1000 disorders. C) 1500 disorders. D) more than 2,000 disorders. 2. All the nerve processes radiating out beyond the brain and spinal cord as well as all the neurons outside the brain and spinal cord constitute the: A) nervous system. B) central nervous system. C) peripheral nervous system. D) external nervous system. 3. Which is NOT part of the peripheral nervous system? A) sensory receptors in the skin B) connections to motor neurons C) sensory and motor connections to internal organs (e.g., the stomach) D) the spinal cord 4. The set of brain structures responsible for most of our unconscious behaviors is called: A) the cerebral hemisphere. B) the brainstem. C) the cerebrum. D) the cerebellum