Al Forsan International School - Grade 11 Worksheet - The Nervous System PDF

Al Forsan International School Term 2 | 2024-2025 Ms. Manar Al-Huneidi Grade 11 ___ Worksheet (The Nervous System) 1. Label the structures of the neuron. A. Dendrites B. Nucleus C. Cell body D. Axon E. Myelin sheath F. Axon terminal 2. What are the main functions of the...

Al Forsan International School Term 2 | 2024-2025 Ms. Manar Al-Huneidi Grade 11 ___ Worksheet (The Nervous System) 1. Label the structures of the neuron. A. Dendrites B. Nucleus C. Cell body D. Axon E. Myelin sheath F. Axon terminal 2. What are the main functions of the nervous system? The nervous system collects information about the body’s internal and external environment, processes that information, and responds to it. 1 3. Name the two parts of the nervous system and explain what each part does Peripheral nervous system and central nervous system. The peripheral nervous system collects information about the body’s environment. The central nervous system processes that information and creates a response that is delivered by the peripheral nervous system. For Questions 3–7, complete each statement by writing the correct word or words. 3. Neurons that carry impulses from the eyes to the spinal cord and brain are called sensory neurons 4. Motor neurons carry impulses from the brain and spinal cord to muscles and glands 5. The neuron’s cell body has short, branched extensions called dendrites which receive impulses from other neurons. 6. In most animals, axons and dendrites of different neurons are clustered in bundles called nerves. 7. The insulating membrane that surrounds a single axon in some neurons is called the myelin sheath. 8. Describe the role of sodium ions in propagating a nerve impulse. Sodium ions flow into the cell, temporarily making the inside of the cell membrane more positive than the outside. This reversal of charges causes an action potential. 9. What is the threshold of a neuron? The threshold is the minimum level of a stimulus that is required to cause an impulse in a neuron. For questions 10-13, write the letter of the correct answer on the line at the left. 10. What is the main link between the brain and the rest of the body? A. cerebrum B. spinal cord C. cerebellum D. brain stem 11. Which of the following is the best example of a reflex? A. jumping up and down B. running in a race C. slowly putting your foot into cool water D. pulling your hand away from a hot pot 2  12. Which part of the brain controls blood pressure, heart rate, breathing, and swallowing? A. brain stem B. limbic system C. cerebral cortex D. thalamus 13. Which part of the brain is the site of intelligence, learning, and judgment? A. brain stem B. cerebellum C. cerebrum D. limbic system For Questions 14-18, match the part of the brain with its function. Part of Brain Function C 14. cerebrum A. Coordinates and balances the actions of the muscles A 15. cerebellum B. Regulates the flow of information between the brain B 16. brain stem and the rest of the body E 17. thalamus C. Controls voluntary activities of the body D 18. hypothalamus D. Controls hunger, thirst, fatigue, anger, and body temperature E. Receives and relays messages from the sense organs 19. What is the function of the sensory division of the peripheral nervous system? It transmits impulses from sense organs to the central nervous system. 20.Complete the concept map. 3  Peripheral Nervous System is separated into Somatic Autonomic Nervous System nervous system consists of Sympathetic nervous system Parasympathetic nervous system 21. What is the function of the autonomic nervous system? It regulates activities that are involuntary or not under conscious control. 22. What is the function of the parasympathetic nervous system? It prepares the body for relaxation or the “rest and digest” response 4