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Nervous stystem
test
| Question | Answer |
|---|---|
| Define Neuromuscular junction | The area where a neuron sends info. to another muscle |
| Define Interneurons | Are cells only in the central nervous system |
| Define Neurotransmitters/acetylcholine/norepinephrine | Cells that carry impulses |
| Define REfractory period | Is when cells resets |
| Define Threshold | Is the amount of sensitvely/votage it takes to acturate |
| Define resting neuron | Is the neuron with potassium concentration greater then sodium and less positive then on the outside |
| Define Nodes of Ranvier | Are the gaps between the myeliners or schwann cells |
| Define Schwann cells | Cells that make myelin |
| Define Myelin | A cover over axons |
| What is the purpose of the nervous system? | To gather information, analyze, send information, and to respond to information |
| Where would you find synaptic knobs? | At the ends of axons |
| Where would you find moter end plates? | At the end of synaptic knob |
| Where would you find gap junctions? | In electrical synapses on axons |
| What is the function of synaptic knobs? | carry information |
| Function of motor end plates? | carry information to a motor neuron |
| What is meant by the term"threshold" when talking about neurons? | It is the minimul amount of sensitivity/voltage needed to stimulate a nerve |
| What are the two types of nerve cells found in nervous tissue? What are their functions? | Sensory( to recieve information)Motor ( sense information to effectors) |
| What is meant by the " fight or flight" system? Why is it called that? | Is the symphatic system and it is called that because the body is in atoms and moble mood |
| What is the purpose of the symphatic nervous system? | To increase the bodies reactions to protect itself |
| What is the purpose of the parasympathetic system? | Stable the bodies systems |
| What are meninges? What are the 3 parts? Where do you find meninges? | The outer layer covering the brain. The three parts are Dura mater,arachnoid, and pia mater. Menings are found around the heart. |
| What is white matter? Gray matter? | Sclera is the white matter. Nerve cell bodies is the gray matter |
| What is the corpus collosum? | Part of the brain that connects the two lobes. |
| What does the brainstem consist of? | Pons, oblongata medulla, midbrain |
| What does the pituitary gland do? | It controls secretion of hormones like adreneline |
| What is the purpose of Schwann Cells? | They make myelin |
| Why might it be benefical for a nerve cell to be myelinatec? | It increases efficence of a cell |
| What are the 3 different types of neurons? Describe the function of each? Where would you find them? | Sensory, motor, inter. Sensory- carries a impulse from a receptor. Motor- Carries impulses to effectors( througout whole body). Inter- used for thinking( brain and spine) |
| What does the central nervous system include? | The brain and spine |
| What is the brain's function in the nervous system? | To analyze a pon and sense |
| What is a neuromuscular junction? What happens there? | It is where muscles are sent to do something from neurons. |
| What does the diencephalon consist of? function? | Thalmus, and hypothalmus. Their function is to relay information |
| What is the difference between an electrical and a chemical synapse? What are the advantages of electrical synapses? | Electrical are faser and synochronize a group of neurons. An advantage is that it is more efficent at transporting impluses. |
| What is the Sodium-potassium pump? How does it work and why is it important to the " firing" of a nerve cell? | It is a system which controls sodium and potassium intake in a neuron. It works by forcing one chemical in and one chemical out rapidly. It is important becaue it sends impulses. |
| How does an impulse travel along a nerve cell membrane? | It goes through an axon by a process called action potential. |
| When is a nerve cell membrane unable to carry impulses? | When it is damaged or in infractory period |
| What is an effector? Receptor? What is their relationship in the nervous system? | A thing effected by another thing. Something that recieves info. They tell the body what to do if their is a problem. |
| What are the rodes and cones? | Rods-allow us to see in dim lightCones- brigher lights stimulate cones. |
| Which part of the ear is considered the organ of hearing? | Cochlea |
| What is the purpose of the Eustachian tube? | To equalize pressure in the brain |
| What are the divisions of the ear? What are the parts in each? | Inter, mid, and outer. Inter has choclea and semicirclur canals. Mid has tympanic membrane, eustachian tube, and ossicles. Outer- apina or aurlica. |
| Name the 12 cranial nerves | Olfactoryopticoculomotertroichleartrigeminalabducensfacialvestibulo cochlearglossopharyngealvagusspinal accessoryhypo glossal |
Created by:
dana1
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