nervous system Flashcards

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1
Q

what is the point of the nervous system

A
  • control all important actions

- receives, processes, stores and transmits info

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2
Q

what are the 2 parts of the nervous system

A
  • peripheral (nerves)

- central (barin and spinal cord)

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3
Q

what is a neuron

A
  • specialized nerve
  • receives and transmits messages
  • do not reproduce
  • conductive
  • can be stimulated
  • need oxygen to live
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4
Q

what are the parts of a neuron

A
  • dendrite
  • axon
  • cell body
  • axon terminal
  • myelin sheath
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5
Q

what is the role of a neuron

A
  • detect stimuli

- send nerve impulses

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6
Q

what is stimuli

A

anything that can be perceived by a living organism that triggers a reaction

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7
Q

what is a nerve impulse

A

electrical signal transmitted by a neuron

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8
Q

what are the steps that happen to transmit a nerve impulse

A
  1. dendrites pick up stimuli and turn it into nerve impulses
  2. impulses then travel the neuron through the axons and then go to the axon terminal
  3. the nerve impulses are then transmitted from nerve to nerve through the synapse
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9
Q

what is a synapse

A

space between neurons

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10
Q

what is a nerve

A

helps transmit info between the central nervous system and other parts of the body

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11
Q

what is the purpose of the peripheral nervous system

A

connects different parts of the body to the central nervous system

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12
Q

what are the three different types of nerves

A
  • sensory
  • motor
  • mixed
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13
Q

what are sensory receptors

A
  • receive stimuli from outside and inside and turn it into nerve impulses
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14
Q

where are sensory receptors located

A

found in sensory organs

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15
Q

what are sensory nerves

A
  • TRANSPORT nerve impulses from sensory receptors to the central nerve system
  • receive impulses from sensory organs and internal organs
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16
Q

what is the difference between sensory receptors and sensory nerves

A
nerves = transport the impulses made in the receptors
receptors = pick up stimuli and turn it into impulses
17
Q

what are motor nerves

A
  • transport impulses from the central nervous system to the muscles
  • helps produce voluntary and involuntary mouvement
  • send impulses to the glands
18
Q

what makes up the central nervous system

A
  • brain

- spinal cord

19
Q

what are the parts of the brain

A
  • cerebrum
  • cerebellum
  • brain stem
20
Q

what is the cerebrum in charge of

A
  • voluntary mouvements
  • intelligence
  • emotions
  • interpreting senses
21
Q

what does the left hemisphere of the cerebrum control

A

right side of the body

22
Q

what does the right hemisphere of the cerebrum control

A

the left side of the body

23
Q

what are the two layers of the cerebrum

A
  • outer layer called the cerebral

- inner layer called white matter

24
Q

what is the role of the cerebellum

A
  • in charge of balance and coordination

- allows us to perform simple and complex tasks

25
Q

where does motion sickness and vertigo come from

A
  • issues with the cerebellum
26
Q

what is the brain stem in charge of

A
  • controls internal stimuli and involuntary mouvement
27
Q

what is the role of the spinal cord

A
  • carries info from parts of the body to the brain
  • reflex center
    passes most nerve impulses from the body to the brain
28
Q

how many pairs of nerves are attatched the spinal cord

A

31 pairs of spinal nerves

29
Q

what is a reflex

A
  • rapid involuntary reaction to stimuli

- allow us to act quickly

30
Q

how are reflexes created

A

the spinal cord intercept a message from a sensory organ and redirect the message to the muscle needed for a quick response
- brain will analyze the reaction after the event has happened

31
Q

what is a reflex arc

A
  • path taken by a nerve impulse during a reflex

- shorter than regular paths so that the action could happen fast

32
Q

what would be a side effect of MS disease

A

people who have ms do not have a certain amount of myelin, if you don’t have enough myelin stimuli would not be able to be relayed quickly

33
Q

how will neurons transmit messages from one to another

A

through the synapse and chemical inside called the neurotransmitter

34
Q

a person is writing a test how is the peripheral nervous system helping you write the test?

A
  1. Sensory receptors are working to pick up the visual of the question
  2. Motor nerves are sending messages to your muscles to write the test
  3. The cerebellum is helping you think of the answer
35
Q

what part of the brain would cause you to be brain dead if it was damaged ?

A

the brainstem

36
Q

what nerves are neck down ?

A

spinal nerves

37
Q

what nerves are neck up

A

cranial nerves

38
Q

you are playing baseball, what is the flow chart

A
  1. Receptors in the eye
  2. Optic nerve
  3. Cerebrum
  4. Spinal cord
  5. Motor nerves
  6. Muscles in the hand