nervous system

Question 1

what is the point of the nervous system

Answer 1

• control all important actions

- receives, processes, stores and transmits info

Question 2

what are the 2 parts of the nervous system

Answer 2

• peripheral (nerves)

- central (barin and spinal cord)

Question 3

what is a neuron

Answer 3

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

Question 4

what are the parts of a neuron

Answer 4

• dendrite
• axon
• cell body
• axon terminal
• myelin sheath

Question 5

what is the role of a neuron

Answer 5

• detect stimuli

- send nerve impulses

Question 6

what is stimuli

Answer 6

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

Question 7

what is a nerve impulse

Answer 7

electrical signal transmitted by a neuron

Question 8

what are the steps that happen to transmit a nerve impulse

Answer 8

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

Question 9

what is a synapse

Answer 9

space between neurons

Question 10

what is a nerve

Answer 10

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

Question 11

what is the purpose of the peripheral nervous system

Answer 11

connects different parts of the body to the central nervous system

Question 12

what are the three different types of nerves

Answer 12

• sensory
• motor
• mixed

Question 13

what are sensory receptors

Answer 13

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

Question 14

where are sensory receptors located

Answer 14

found in sensory organs

Question 15

what are sensory nerves

Answer 15

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

Question 16

what is the difference between sensory receptors and sensory nerves

Answer 16

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

Question 17

what are motor nerves

Answer 17

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

Question 18

what makes up the central nervous system

Answer 18

• brain

- spinal cord

Question 19

what are the parts of the brain

Answer 19

• cerebrum
• cerebellum
• brain stem

Question 20

what is the cerebrum in charge of

Answer 20

• voluntary mouvements
• intelligence
• emotions
• interpreting senses

Question 21

what does the left hemisphere of the cerebrum control

Answer 21

right side of the body

Question 22

what does the right hemisphere of the cerebrum control

Answer 22

the left side of the body

Question 23

what are the two layers of the cerebrum

Answer 23

• outer layer called the cerebral

- inner layer called white matter

Question 24

what is the role of the cerebellum

Answer 24

• in charge of balance and coordination

- allows us to perform simple and complex tasks

Question 25

where does motion sickness and vertigo come from

Answer 25

- issues with the cerebellum

Question 26

what is the brain stem in charge of

Answer 26

- controls internal stimuli and involuntary mouvement

Question 27

what is the role of the spinal cord

Answer 27

- carries info from parts of the body to the brain - reflex center passes most nerve impulses from the body to the brain

Question 28

how many pairs of nerves are attatched the spinal cord

Answer 28

31 pairs of spinal nerves

Question 29

what is a reflex

Answer 29

- rapid involuntary reaction to stimuli | - allow us to act quickly

Question 30

how are reflexes created

Answer 30

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

Question 31

what is a reflex arc

Answer 31

- path taken by a nerve impulse during a reflex | - shorter than regular paths so that the action could happen fast

Question 32

what would be a side effect of MS disease

Answer 32

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

Question 33

how will neurons transmit messages from one to another

Answer 33

through the synapse and chemical inside called the neurotransmitter

Question 34

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

Answer 34

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

Question 35

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

Answer 35

the brainstem

Question 36

what nerves are neck down ?

Answer 36

spinal nerves

Question 37

what nerves are neck up

Answer 37

cranial nerves

Question 38

you are playing baseball, what is the flow chart

Answer 38

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