Nervouse System

Question 0

Sympathetic division. S/S

Answer 0

Fight or flight (prepares body to meet demand), involuntary to external stimulus.
- increased HR/BP, constricts blood vessels (chills/sweating), pupils/bronchi dilates, inhibits digestion, decreased saliva and muscles become tense

Question 1

Functions of nervous system

Answer 1

Detects change/feeling sensations, initiates response to change and organizes/stores change

Question 2

Parasympathetic division. S/S

Answer 2

Returns body to restful state, regulates involuntary functions (relaxes body)
- slows HR, increases peristalsis (digestion), constricts bronchi/pupils, dilates vessels

Question 3

Both divisions work together to..

Answer 3

Balance body functions (maintain homeostasis)

Question 4

Meninges

Answer 4

Connective tissue that covers brain and spinal cord

-DAP

Question 5

Dura mater (meninges)

Answer 5

Thick outer most layer that lines skull and vertebral canal

Question 6

Arachnoid membrane (meninges)

Answer 6

Middle layer, web like strains

Question 7

Pia mater (meninges)

Answer 7

Thin Inner most layer membrane on surface of spinal cord and brain

Question 8

What contains CSF

Answer 8

Subarachnoid space

Question 9

CSF is formed in

Answer 9

Ventricles of the brain by CHOROID PLEXUSES (from blood plasma)

Question 10

CSF circulates from

Answer 10

Ventricles to central canal of spine-cranial/spinal subarachnoid space

Question 11

CSF’s reabsorbed from

Answer 11

Cranial subarachnoid space through arachnoid villi-blood I CRANIAL VENOUS SINUSES

Rate reabsorption = production

Question 12

CSF’s functions

Answer 12

Carries nutrients to CNS, removes waste, shock absorber and cushions CNS

Question 13

Medulla oblongata

Answer 13

Regulates vital functions: HR, BP, breathing. Reflexes of coughing, sneezing, swallowing and vomiting

Question 14

Pons

Answer 14

Respiratory center that works with medulla

Question 15

Midbrain

Answer 15

Center for vital reflexes: visual, auditory, equilibrium

Question 16

Cerebellum

Answer 16

Regulates coordination of voluntary movement. Muscle tone, stopping, movement, posture and equilibrium

Question 17

Hypothalumus

Answer 17

Regulates body temp

Question 18

Cerebrum (largest part of Brian)

Answer 18

Cerebral cortex is the surface of gray matter

Question 19

Frontal lobe

Answer 19

(Motor area) initiate voluntary movement, learned skills, social behavior, speech

Question 20

Parietal lobe

Answer 20

(Sensory) feels and interprets senses conscious muscle tone, taste, and thought before speech

Question 21

Temporal lobe

Answer 21

(Auditory) hearing and interpretation. Olfactory (smell and interpretation)

Question 22

Occipital lobe

Answer 22

(Visual) interpretation for spatial relationship

Question 23

Central nervous system (CNS)

Answer 23

Brain and spinal cord (controls all body parts)

-sensory, memories and emotions

Question 24

Peripheral nervous system (PNS)

Answer 24

Cranial/spinal nerves (not in brain or spine) | -brings messages to and from CNS to rest of body

Question 25

Autonomic nervous system (ANS)

Answer 25

Regulates involuntary activities. ( heart beat, pupil dilation) *branches to sympathetic and parasympathetic divisions

Question 26

Receptors

Answer 26

Detect external/internal changes and transmit information to CNS via sensory neurons

Question 27

Stretch reflex

Answer 27

Stretched muscles automatically contract. (Keeps us upright against gravity)

Question 28

Flexor reflex

Answer 28

Withdraw reflex from painful stimulus

Question 29

Reflex arc

Answer 29

Involuntary response to stimulus. (Knee jerk)

Question 30

Neuron

Answer 30

Is the Cell body that contains nucleus. In CNS

Question 31

Axon

Answer 31

Carries impulses away from cell body

Question 32

Dendrites

Answer 32

Carries impulses toward cell body

Question 33

Myelin sheath

Answer 33

Coating on axon for protection. Conducts electrical impulses (electrically insulates neurons from on another)

Question 34

Sensory neuron (afferent neuron)

Answer 34

Carry impulses from receptors to CNS (from skin, skeletal muscles, joints and internal organs)

Question 35

Motor neuron (efferent neuron)

Answer 35

Carry impulses from CNS to effectors. (To skeletal/smooth/cardiac muscles and glands)

Question 36

Synapse

Answer 36

Space between axon (of one neuron) and dendrite (of another neuron)

Question 37

Chemical neurotransmitters

Answer 37

(Boat) released by axon | -acetylcholine, epinephrine, norepinephrine, dopamine and seratonin

Question 38

Chemical Inactivator of Acetylcholine

Answer 38

Cholinesterase

Question 39

Olfactory

Answer 39

Smell

Question 40

Trigeminal

Answer 40

Sensation in face

Question 41

Acoustic

Answer 41

Hearing

Question 42

Vagus

Answer 42

The rest of the body

Question 43

Facial

Answer 43

Motor

Question 44

Spinal cord functions

Answer 44

Transmits impulses to and from brain and integrates spinal cord reflexes

Question 45

Location of spinal cord

Answer 45

within vertebral canals, to disc between 1st and 2nd lumbar vertebrae

Question 46

Central canals contain

Answer 46

CSF within ventricles of brain