Nervous System

Question 1

CNS v. PNS 
central nervous system consists of?
Brain
-
-
Spinal Cord
-transmits ?
-transmits ?

Answer 1

brain and spinal cord

• sensorimotor functions
• cognitive functions
• motor commands to body parts
• sensory info from body parts to the brain

Question 2

Peripheral nervous system 
connects?
somatic nervous system ?
autonomic nervous system?
-
-

Answer 2

CNS to limbs and organs 
-voluntary control 
-involuntary control 
sympathetic system (spends energy)
parasympathetic system (conserves energy)

Question 3

Neuron
3 main elements?
first part

Answer 3

cell body or soma
nucleus
cytoplasm

Question 4

neuron

second main element

Answer 4

dendrites

• afferent (receiving or sensing info)
• receive information from other cells
• short, many branches

Question 5

neuron

third element

Answer 5

axon

• efferent (activating muscles and glands/ motor)
• carries info away from other cell to other cells, glands, or muscles
• length varies from a few micrometers to about one meter ; diameter about 1 micrometer
• covered by myelin

Question 6

neural synapse
connection point between neurons is?
it has three parts?
nerve impulses dont actually ?

Answer 6

called the synapse 
-pre-synaptic terminal 
-synaptic cleft
-post-synaptic cell
cross the synapse

Question 7

the pre-synaptic terminal contains structures able to ?

axons usually synapse with? but they can synapse with ?

Answer 7

release chemical neurotransmitters which cross the synaptic cleft and activate post-synaptic receptors
-dendrites/ other axons or even directly on cell bodies

Question 8

cranial nerves 
-serve?
CN I and CN II are part of?
CNs III - XII have?
some have ? some have ? some are?

Answer 8

head and neck 
12 pairs of cranial nerves 
forebrain 
nuclei in the brainstem 
motor function, sensory function, mixed

Question 9

Brainstem consists of?

Answer 9

midbrain
pons
medulla

Question 10

medulla

Answer 10

many cranial nerve nuclei and other nuclei critical for life function

Question 11

pons: major ?

Answer 11

comm. bridge between spinal cord, vestibular mechanism, brain stem, cerebral cortex . cerebellum

Question 12

midbrain:

recipient of ?

Answer 12

cranial nerve nuclei

-motor pathway as fibers exit cortex to enter brainstem

Question 13

cerebellum:
second largest?
helps provide

Answer 13

nervous system structure

smooth coordinated body movement