27822663
Description
Flashcards by Hannah Moody, updated more than 1 year ago
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Created by Hannah Moody
almost 4 years ago
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| Question | Answer |
| What is the nervous system and what does it do for the body? | It is a system of cells, tissues, and organs that together regulate the body's response to stimuli |
| What are signals from inside the body? | Internal Stimuli |
| What is sensory information from outside of the body? | External stimuli |
| feelings of hunger/thirst, urinary system, fear, anxiety, stress responses, and pain inside of the body such as cramps are all examples of ______ | Internal Stimuli |
| Changes in temp, light, responses to pain and hunger, and changes of the 5 senses are all examples of ______ | external stimuli |
| The nerve cell that does all of the communicating in the nervous system | Neurons |
| What are the jobs of Neuroglia? | Supports neurons and makes sure they can carry out functions sufficiently NOT involved in communication like Neurons |
| projections off cell Body that receive stimuli and transfer stimulus to the cell body | Dendrites |
| contains nucleus and dendrites project off of | Cell body |
| long projection off cell body insulated by myelin and transfers electrical impulse from cell body to terminus | Axon |
| end of axon that releases neurotransmitters | terminus |
| houses cells genetic info in center of cell Body | nucleus |
| part of axon that is not covered in myelin the allows signal to flow through | Nodes of Ranvier |
| insulator that allows signal to flow through | Myelin |
| What is the role of neurotransmitters in the Body? | They are chemical messengers that get released by a neuron, their job is to transfer information from one neuron to the next. |
| What maintains chemical environment of the neuron and protects and maintains the blood brain barrier? (found in Brain and Spinal Chord)? | Astrocytes |
| What produces cerebrospinal fluid and protects the brain and spinal chord? | Ependymal cells |
| What wraps around the neuron and creates myelin so that the electrical signal can be sent?( ONLY located in brain and spinal chord) | Oligodendrocytes |
| what wraps around neuron and insulates it with myelin BUT only wraps around neurons OUTSIDE fo the brain and spinal chord? | Schwann cells |
| what is a reflex? | an involuntary response to a stimulus |
| What is the first step to a reflex arc? What is its job? | AFFECTOR- converts stimulus to an electrical signal |
| In a reflex arc what is the job of the sensory/Afferent Neuron? | Transmits electrical signal to spinal chord |
| What is the "middle man" of the reflex arc that communicates between sensory and motion neurons? | Interneuron |
| Motor/Efferent Nuerons do what? | transmit respose info into effector |
| What is the muscle gland responsible for response in the reflex arc? | Effector |
| How does a reflex work? | Your body links a stimulus to a response automatically; the brain does not have to evaluate the stimulus |
| What are some examples of 5 different reflexes? | 1- yawning 2-sneezing/coughing 3-corneal relfex 4-righting reflex 5- pupil reflex |
| can reflexes be controlled? if so what are some examples of controlled reflexes? | YES, eye blinking, Bladder reflexes, and sometimes you can control your gag reflex |
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