H. composed of the brain and spinal cord.

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1 Mrs. Keadle H Science Name period date assigned date due date returned Match the following vocabulary words to their definition. Please write a capital letter in the blank. 1. central nervous system 2. peripheral nervous system 3. cerebrum 4. cerebellum 5. brain stem 6. spinal cord 7. neuron 8. synapse 9. reflex A. a bundle of nerves that links your brain and peripheral nervous system. B. tiny space between a the axon of one neuron and the dendrites of the next.. connects your brain to your spinal cord and controls involuntary actions like breathing, digesting and heartbeat. D. is an automatic response that occurs very rapidly and without conscious control. E. second largest part of your brain that coordinates your muscles and controls your balance.. largest part of the brain that controls thinking, problem solving, the senses and memories. G. a cell that moves messages in the form of fast-moving electrical energy called impulses. H. composed of the brain and spinal cord. I. network of nerves that connects your rain to the rest of your body. 1

2 Mrs. Keadle H Science 10 Which of the following is a major characteristic of the central nervous system? 11 Which cell organelle performs the same job for the cell that the nervous system does for your body? A it is composed of the nerves in the head. cell wall B It is composed of the spinal nerves. G nucleus H mitochondria It is composed of the brain and spinal cord. endoplasmic reticulum D It is composed of the synapses in the brain. 12 The above picture shows two neurons. A nerve impulse moves from neuron A to neuron B by - A B D the release of carbohydrates into the synapse the release of chemicals called neurotransmitters that help the signal jump the synapse the dendrites that are connected neuron A hitting against neuron B 2

3 Mrs. Keadle H Science 13 If a chemical such as alcohol were to block the synapse between these two neurons, what would happen to the person s level of thought and reaction time? G it would increase it would decrease H it would not change it would increase for alcohol and decrease for a drug 14 amille was helping in the kitchen and accidentally grabbed a hot pan. The sentences below explain how three body systems work together to get amille out of danger. What is the correct order of these steps. 1. A signal goes to the muscles to contract away from the source of pain. 2. A signal is sent along the nervous system that the hand is in pain. 3. The muscles move the bones in the hand and arm. 4. Nerves in the fingers sense the hot pan. A 2, 1, 3, 4 B 2, 4, 1, 3 4, 3, 2, 1 D 4, 2, 1, 3 3

4 Mrs. Keadle H Science 16 Matthew made a model of the human ear by creating the shape with plaster and putting a small microphone in the ear canal. 15 What is the function of the axon in a nerve cell? controls all the activities of the neuron G receives messages from the axon tips H sends messages to the dendrites In this model, what system does the microphone represent? (Hint: the microphone is receiving information) A skeletal system B integumentary system nervous system D circulatory system carries messages away from the cell body 17 The sense organs send information about the environment to the brain G autonomic nervous system H somatic nervous system semicircular canals 18 Which organ is the main control center of the nervous system? A brain B heart medulla D spinal cord 4

5 Mrs. Keadle H Science 19 What is the role of the nervous system in the body? to protect other organs and tissues G to send messages using blood cells 21 Zeke saw a pen he dropped on the floor. He bent down and picked up the pen. His brain had to receive information from the eyes. Then it sent signals to his muscles so he could pick up the pen. What type of neurons sent impulses to hi muscles? H to gather and respond to information to transport oxygen and carbon dioxide axon G motor H sensory dendrite 20 Sara puts on her new winter scarf. Signals are sent to her brain telling her that the scarf is soft. Which sense provides her brain with this information? 22 The nose receives chemical signals from your food. This information is transmitted to the brain. Which body system does this process describe? A pain A nervous system B sight B excretory system touch circulatory system D emotion D integumentary system 5

6 Mrs. Keadle H Science 23 Most cells in the body are specialized to perform a certain task. Neurons are cells that are specialized to move messages through the nervous system. The diagram shows parts of a neuron. What are the parts of the neuron that are shown, in order from A to D? G gland, capillaries, spinal cord, nerves cell body, dendrites, axon, axon terminal H axon, cell body terminal, cell body, dendrites cerebrum, capillaries, spinal cord, brain stem 6

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