Flashcards
The Nervous System Cell Types & Reflexes QUIZ REVIEW
Cards in this deck (28)
- 1What 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
- 2What are signals from inside the body?Internal Stimuli
- 3What is sensory information from outside of the body?External stimuli
- 4feelings of hunger/thirst, urinary system, fear, anxiety, stress responses, and pain inside of the body such as cramps are all examples of ______Internal Stimuli
- 5Changes in temp, light, responses to pain and hunger, and changes of the 5 senses are all examples of ______external stimuli
- 6The nerve cell that does all of the communicating in the nervous systemNeurons
- 7What are the jobs of Neuroglia?Supports neurons and makes sure they can carry out functions sufficiently NOT involved in communication like Neurons
- 8projections off cell Body that receive stimuli and transfer stimulus to the cell bodyDendrites
- 9contains nucleus and dendrites project off ofCell body
- 10long projection off cell body insulated by myelin and transfers electrical impulse from cell body to terminusAxon
- 11end of axon that releases neurotransmittersterminus
- 12houses cells genetic info in center of cell Bodynucleus
- 13part of axon that is not covered in myelin the allows signal to flow throughNodes of Ranvier
- 14insulator that allows signal to flow throughMyelin
- 15What 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.
- 16What maintains chemical environment of the neuron and protects and maintains the blood brain barrier? (found in Brain and Spinal Chord)?Astrocytes
- 17What produces cerebrospinal fluid and protects the brain and spinal chord?Ependymal cells
- 18What wraps around the neuron and creates myelin so that the electrical signal can be sent?( ONLY located in brain and spinal chord)Oligodendrocytes
- 19what wraps around neuron and insulates it with myelin BUT only wraps around neurons OUTSIDE fo the brain and spinal chord?Schwann cells
- 20what is a reflex?an involuntary response to a stimulus
- 21What is the first step to a reflex arc? What is its job?AFFECTOR- converts stimulus to an electrical signal
- 22In a reflex arc what is the job of the sensory/Afferent Neuron?Transmits electrical signal to spinal chord
- 23What is the "middle man" of the reflex arc that communicates between sensory and motion neurons?Interneuron
- 24Motor/Efferent Nuerons do what?transmit respose info into effector
- 25What is the muscle gland responsible for response in the reflex arc?Effector
- 26How does a reflex work?Your body links a stimulus to a response automatically; the brain does not have to evaluate the stimulus
- 27What are some examples of 5 different reflexes?1- yawning
2-sneezing/coughing
3-corneal relfex
4-righting reflex
5- pupil reflex - 28can 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