What is the function of the nervous system?

2. What is the function of the nervous system? Regulation To regulate (control) all body processes.

3. A structure that detects stimuli is a a) effector  b) synapse      c) receptor        d) muscle

4. 1. A muscle or gland which responds to a message carried to it by motor neurons is called a(n) _______. 2. A change in the surroundings or the environment that triggers a nerve impulse is called a(n) _____. 3. The electrochemical message that travels through the nervous system is known as the _________. 4. A change in the external environment that initiates (starts) an impulse is called a _______. 5. Nerve cells are called __________. effector stimulus impulse impulse neurons

5. Neuron Structure Most axons are covered with ___________ which aids impulse  transmission by improving electrical insulation. ___________ receive the impulse from the previous neuron. The longest part of a neuron is the ______. The ____________ contains the nucleus and other cell organelles. The part of the neuron that produces and releases neurotransmitters are the ____________. Neurotransmitters attach to __________ on the next neuron. myelin Dendrites axon cell body terminal branches receptors

6. How does an impulse travel from one neuron to the next? Neurotransmitters are released into the synapse.

7. Synapses are located directly between  (1.) dendrites and axons  (2.) cytons and axons  (3.) terminal branches and dendrites  (4.) axons and terminal branches

8. What does this picture represent? Central Nervous System

9. Sensory neurons transmit impulses from the _________ to the ________________. 2. Interneurons carry impulses from the _____________ to ____________. 3. Motor neurons carry impulses from the __________ to ___________. receptors spinal cord (CNS) sensory neurons motor neurons spinal cord effectors

10. Sensory neurons transmit messages from the central nervous system to a muscle a gland b) from the brain to the spinal cord c) from the environment to the spinal cord or brain d) within the brain e) All of the above are true.

11. In a simple spinal reflex, the pathway for an impulse is along a sensory neuron directly to a motor neuron through  (1.) a receptor  (2.) an interneuron  (3.) an effector  (4.) the brain

12. What structures make up your central nervous system? Brain and Spinal Cord

13. Neurons that carry messages toward the CNS (brain and spinal cord) are called sensory neurons

14. Identify the part of the brain being describe. What structure controls reasoning, memory, emotions, and habits? What controls involuntary actions? What controls and coordinates voluntary actions and balance? Loss of memory as a result of an accident would indicate damage to which part? What controls activities such as breathing and heart rate? cerebrum medulla cerebellum cerebrum medulla

15. Identify the parts of the brain labeled in the diagram. cerebrum cerebellum medulla spinal cord

16. Why are reflexes much faster than a normal response? The impulse only travels to the spinal cord, not the brain.

17. motor neuron B Receptor interneuron A sensory neuron