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Nervous System
The Nervous System
| Question | Answer |
|---|---|
| The functional unit of the nervous system is a ? | Neuron |
| A neuron consists of three parts. What are they? | Cell body Dendrites Axon |
| What receives stimuli and is a short extension of the cell body? | Dentrites |
| This is a long, slender extension that transmits an impulse from the cell body to another neuron or organ? | Axon |
| What are the three group of neurons? | Sensory Neurons Motor (effector) neurons Inter neurons |
| These neurons receive impulses from the environment and bring them to the body? | Sensory Neurons |
| These neurons transmits the impulse to muscles or glands to produce a response. | Motor Neurons |
| This neuron can be found in the brain or spinal cord. It links sensory neurons and motor neurons | Inter neurons |
| An important neurotransmitter is Acetylcholine. Why? | It is picked up almost instantly by the dendrites of the next neuron. It stimulates muscles to contract. |
| What is a schwann cell? | These cells produce a myelin sheath that insulates axons. |
| What are the spaces between the myelin sheaths called. This is the exposed regions of the axon? | Nodes of Ranvier |
| Do myelin sheaths speed up or slow down a reaction? | They speed up. |
| The space between two neurons is called? | Synapse |
| This nervous system includes the neurons in the brain and spinal cord | Central Nervous System |
| This system includes the neurons outside of the brain and spinal cord. These neurons are in our skin, organs and blood vessels | Peripheral Nervous System |
| The peripheral nervous system can be broken down into two systems called? | Somatic Nervous System Autonomic Nervous System |
| The fight or flight response is activated by what system? | The sympathetic nervous system |
| After the fight or flight crisis is over, this system brings the body back into homeostasis? | The parasympathetic nervous system |
| This part of the brain controls all voluntary activities; receives and interprets sensory information; largest part of the brain | Cerebrum |
| This part of the brain coordinates muscle activity and refinement of movement | Cerebellum |
| This part of the brain regulates homeostasis and secretes hormones; regulates pituitary gland | Medulla |
| This connects parts of the brain with one another and contains respiratory center | Pons |
| This is the center for visual and auditory reflexes (pupil reflex and blinking) | Midbrain |
| This is the main sensory relay center for conducting information between spinal cord and cerebrum | Thalamus |
| What is a thick band of nerve fibers of the white matter that enable the right and left side of the cerebral hemispheres to communicate? | Corpus callosum |
| _______ controls many vital functions such as heartbeat, respiration and blood pressure. | Medulla oblongata |
| ______ integrates simple motor responses. | Cerebellum |
| _____ is the reflex center for muscular coordination. | Spinal cord |
| _______ is composed of gray matter | Cerebral cortex |
| _____ is the most complex part of the mammalian brain | Cerebral cortex |
Created by:
Nzink198
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