1. Nervous System VOCABULARY

2. Vocabulary  Afferent  Autonomic Nervous System  Cerebral Spinal Fluid  Conductivity  Congenital  Efferent  Equilibrium  Excitability  Homeostasis  Interneurons  Ischemia  Meninges  Neurotransmitter  Paralysis  Reflex  Somatic Nervous System  Stimulus  Synapse

3. Stimulus  any substance or action that produces a response

4. Synapse  space between two neurons

5. Conductivity  the ability to transmit a signal

6. Excitability  the ability to respond to a stimulus

7. Ischemia  insufficient blood to a body part caused by functional constriction or actual obstruction of a blood vessel

8. Afferent  sensory

9. Cerebral Spinal Fluid  fluid contained in the brain’s ventricles, intracranial spaces, and central canal of the spinal cord

10. Congenital  present at birth

11. Somatic Nervous System  voluntary nerves

12. Homeostasis  the parasympathetic division operates to keep the body in this

13. Reflex  an involuntary action in response to a stimulus

14. Neurotransmitter  chemical messenger, released from the axon of one neuron, that travels to another nearby neuron

15. Paralysis  a loss of movement and sensation in a part of the body

16. Efferent  motor neurons

17. Meninges  three membranes that surround and protect the brain and spinal cord

18. Autonomic Nervous System  involuntary nerves

19. Equilibrium  balance

20. Interneurons  connecting nerves that carry messages from afferent nerves to efferent nerves

21. KEY  Afferent - sensory  Autonomic Nervous System - involuntary nerves  Cerebral Spinal Fluid - fluid contained in the brain’s ventricles, intracranial spaces, and central canal of the spinal cord  Conductivity - the ability to transmit a signal  Congenital - present at birth  Efferent - motor neurons  Equilibrium - balance  Excitability - the ability to respond to a stimulus  Homeostasis - the parasympathetic division operates to keep the body in this

22. KEY  Interneurons - connecting nerves that carry messages from afferent nerves to efferent nerves  Ischemia - insufficient blood to a body part caused by functional constriction or actual obstruction of a blood vessel  Meninges - three membranes that surround and protect the brain and spinal cord  Neurotransmitter - chemical messenger, released from the axon of one neuron, that travels to another nearby neuron  Paralysis - a loss of movement and sensation in a part of the body  Reflex - an involuntary action in response to a stimulus  Somatic Nervous System - voluntary nerves  Stimulus - any substance or action that produces a response  Synapse - space between two neurons