Nervous System Test,

What are the two parts of the nervous system? A. Brain and spinal nerves B. Central Nervous System and Peripheral Nervous System C. Brain stem and cerebrum D. Neurons and neuroglia ________________________________________ 2. What are nerves? A. Brain cells that process thought B. Bundles of nerve cells C. Muscle fibers D. Layers of connective tissue ________________________________________ 3. What are cranial nerves? A. Nerves found in the spinal cord B. Nerves that extend from the brain (12 pairs) C. Sensory nerves in the legs D. Nerves found only in the eyes ________________________________________ 4. How many pairs of spinal nerves are there? A. 12 B. 24 C. 31 D. 8 ________________________________________ 5. What are the two types of nerves and what do they do? A. Interneurons and reflexes — send pain messages B. Autonomic and somatic — carry blood C. Sensory (to CNS) and motor (from CNS to effectors) D. Cranial and spinal — regulate breathing ________________________________________ 6. What are effectors in the nervous system? A. Sensory nerves B. Brain regions C. Muscles and glands D. Hormones ________________________________________ 7. What is a resting neuron? A. A neuron that has died B. A damaged nerve cell C. A neuron not currently transmitting an impulse D. A neuron with a positive charge inside ________________________________________ 8. What is the charge inside the membrane of a resting neuron? A. Negative B. Neutral C. Positive D. Zero ________________________________________ 9. What is the charge outside the membrane of a resting neuron? A. Neutral B. Positive C. Negative D. Equal to the inside ________________________________________ 10. What does "polarized" mean in neuron function?