Chapter 8 Q&A PDF

### **Chapter 08** 1. The nervous system is subdivided into two main parts: A. Somatic and Autonomic B. Central and Peripheral C. Sympathetic and Parasympathetic D. Motor and Sensory 2. The Central Nervous System (CNS) consists of: A. Brain and Spinal Cord B. Brain and Nerves C. Spinal Co...

### **Chapter 08** 1. The nervous system is subdivided into two main parts: A. Somatic and Autonomic B. Central and Peripheral C. Sympathetic and Parasympathetic D. Motor and Sensory 2. The Central Nervous System (CNS) consists of: A. Brain and Spinal Cord B. Brain and Nerves C. Spinal Cord and Nerves D. Brain and Peripheral Nerves 3. The Peripheral Nervous System (PNS) is functionally divided into: A. Sensory and Motor divisions B. Autonomic and Somatic divisions C. Sympathetic and Parasympathetic divisions D. Motor and Reflexive divisions 4. The motor (efferent) division is responsible for: A. Sensory input B. Muscle movement C. Processing information D. Reflex action 5. Neuron structure includes: A. Soma, Dendrites, Axon B. Axon, Myelin, Schwann cells C. Synapse, Myelin, Soma D. Dendrites, Synapse, Myelin 6. The function of dendrites is to: A. Transmit signals away from the neuron B. Receive signals and transmit them to the cell body C. Create neurotransmitters D. Produce myelin 7. The axon functions to: A. Carry signals toward the neuron B. Store neurotransmitters C. Transmit signals away from the cell body D. Protect the neuron 8. Multipolar neurons: A. Have one axon and multiple dendrites B. Have two axons C. Lack dendrites D. Only exists in the spinal cord 9. Bipolar neurons have: A. One dendrite and one axon B. Many dendrites and one axon C. No axon D. Only one projection from the soma 10. Unipolar neurons: A. Have one process that branches into two parts B. Have multiple axons C. Lack axons D. Only exist in the CNS 11. Sensory neurons: A. Relay motor commands B. Transmit sensory signals to the CNS C. Coordinate muscle movement D. Are part of the autonomic nervous system 12. Afferent neurons: A. Carry signals from muscles to the CNS B. Carry signals to the CNS C. Are motor neurons D. Transmit reflex signals 13. Efferent neurons: A. Transmit signals to the CNS B. Transmit signals from the CNS to muscles and glands C. Process sensory information D. Connect sensory neurons to motor neurons 14. Interneurons: A. Connect sensory neurons to muscles B. Relay signals between sensory and motor neurons within the CNS C. Are located outside the CNS D. Provide insulation for neurons 15. Oligodendrocytes are: A. Cells that produce myelin in the CNS B. Cells that provide structural support in the CNS C. Immune cells within the CNS D. Myelin-producing cells in the PNS 16. Schwann cells are: A. Myelin-producing cells in the PNS B. Support cells in the brain C. Cells that produce myelin in the CNS D. Immune cells in the nervous system 17. What is the resting membrane potential (RMP) of a neuron? A. +70 mV B. -70 mV C. 0 mV D. -90 mV 18. When a neuron is polarized, which side has a positive charge? A. The outside surface B. The inside surface C. The dendrite D. The axon terminal 19. Action potentials are: A. Electrical impulses generated by neurons B. Signals that decrease membrane potential C. Released neurotransmitters D. Processes where the neuron remains inactive 20. The spinal cord extends from: A. The foramen magnum to the second lumbar vertebra B. The brainstem to the sacrum C. The cervical vertebrae to the pelvis D. The thoracic vertebrae to the coccyx 21. The four regions of the spinal cord are: A. Cervical, Thoracic, Lumbar, Sacral B. Cervical, Thoracic, Lumbar, Coccygeal C. Sacral, Thoracic, Lumbar, Pons D. Pons, Medulla, Midbrain, Sacral 22. The medullary cone is: A. The tapered end of the spinal cord B. A part of the brainstem C. A network of nerves in the spinal cord D. The covering of the spinal cord 23. The dura mater, arachnoid mater, and pia mater are: A. Layers of the brain B. Layers of the meninges surrounding the spinal cord and brain C. Nerve fibers in the spinal cord D. Sections of the vertebral column 24. The posterior root contains: A. Sensory fibers B. Motor fibers C. Mixed fibers D. Autonomic fibers 25. The anterior root contains: A. Sensory fibers B. Motor fibers C. Mixed fibers D. Autonomic fibers 26. Cervical plexus fibers extend from: A. C1 to C4 B. C2 to C5 C. C3 to C7 D. C4 to T1 27. One of the largest fibers in the cervical plexus that extends through C1-C3 is: A. The Phrenic nerve B. The Lesser occipital nerve C. The Hypoglossal nerve D. The Cervical nerve 28. The phrenic nerve extends from: A. C1 to C3 B. C3 to C5 C. C5 to C8 D. C6 to T1 29. Ulnar, radial, and axillary nerves are examples of the: A. Brachial plexus B. Cervical plexus C. Lumbar plexus D. Sacral plexus 30. Lumbar and sacral plexus fibers connect to form the: A. Phrenic plexus B. Sciatic nerve C. Femoral plexus D. Lumbosacral plexus 31. A reflex arc consists of: A. Receptor, Sensory neuron, Motor neuron, Effector B. Receptor, Motor neuron, Spinal cord C. Spinal cord, Brain, Effector D. Sensory neuron, Interneuron, Motor neuron, Brain 32. A receptor in a reflex arc is: A. A sensory organ that detects stimuli B. A muscle that contracts C. The brain region processing the reflex D. The neurotransmitter that triggers a response 33. The effector in a reflex arc is: A. The neuron that sends sensory information B. A muscle or gland that carries out the response C. The spinal cord processing center D. The brain area coordinating the action **[Answers]** 1\. B) Central and Peripheral 2\. A) Brain and Spinal Cord 3\. A) Sensory and Motor divisions 4\. B) Muscle movement 5\. A) Soma, Dendrites, Axon 6\. B) Receive signals and transmit them to the cell body 7\. C) Transmit signals away from the cell body 8\. A) Have one axon and multiple dendrites 9\. A) One dendrite and one axon 10\. A) Have one process that branches into two parts 11\. B) Transmit sensory signals to the CNS 12\. B) Carry signals to the CNS 13\. B) Transmit signals from the CNS to muscles and glands 14\. B) Relay signals between sensory and motor neurons within the CNS 15\. A) Cells that produce myelin in the CNS 16\. A) Myelin-producing cells in the PNS 17\. B) -70 mV 18\. A) The outside surface 19\. A) Electrical impulses generated by neurons 20\. A) The foramen magnum to the second lumbar vertebra 21\. A) Cervical, Thoracic, Lumbar, Sacral 22\. A) The tapered end of the spinal cord 23\. B) Layers of the meninges surrounding the spinal cord and brain 24\. A) Sensory fibers 25\. B) Motor fibers 26\. A) C1 to C4 27\. A) The Phrenic nerve 28\. B) C3 to C5 29\. A) Brachial plexus 30\. D) Lumbosacral plexus 31\. A) Receptor, Sensory neuron, Motor neuron, Effector 32\. A) A sensory organ that detects stimuli 33\. B) A muscle or gland that carries out the response