Nervous System

Question 1

Function of Nervous System

Answer 1

Controls the internal environment
Voluntary control of movement
Provides sensory info
Programming spinal cord reflexes
Memory and learning

Question 2

Cell body

Answer 2

integrates info

Question 3

Dendrites

Answer 3

impulses towards cell body

Question 4

Axon

Answer 4

impulse away from cell body
covered with Schwann cells and forms myelin sheath

Question 5

Synapse

Answer 5

contact points b/t axon of one neuron and dendrite of another

Question 6

Excitatory transmitter

Answer 6

cause depolarization

Question 7

Inhibitory transmitter

Answer 7

cause hyperpolarization

Question 8

Norepinephrine neurotransmitter

Answer 8

found in PNS and CNS, Excess: associated with mania, Low: depression

Question 9

Dopamine

Answer 9

found in CNS, Attention, Emotional behavior, Addictive behavior, parkinsons

Question 10

Serotonin

Answer 10

found in PNS and CNS, linked with depression and irregulates circadian rhythm

Question 11

Osmoreceptors

Answer 11

hydration/concentration

Question 12

Baroreceptors

Answer 12

respond to pressure changes in blood vessels

Question 13

Proprioceptors

Answer 13

provide CNS information about body position and joint angle

Question 14

Muscle chemoreceptors

Answer 14

provide CNS info on metabolic rate of muscular activity, sensitive to chemical changes

Question 15

Reflexes order of events

Answer 15

Afferent
interneurons in spinal cord activate motor neurons
efferent

Question 16

Reciprocal inhibition

Answer 16

agonist contracts
antagonist relaxes

Question 17

Muscle spindle

Answer 17

detect rate of change in muscle length
stretch reflex

Question 18

Golgi Tendon Organs

Answer 18

monitors tension in muscle
prevents damage during excessive force generation

Question 19

Vestibular apparatus

Answer 19

located in inner ear
maintains equilibrium and balance
sensitive to angular and linear accelerations

Question 20

Somatic motor neurons of PNS

Answer 20

carry messages from brain/spinal cord to muscle (efferent)

Question 21

Innervation ratio

Answer 21

number of muscle fibers per motor neuron

Question 22

Brain Stem

Answer 22

Controls CV and respiratory system

Question 23

Cerebrum

Answer 23

cerebral cortex
motor cortex

Question 24

cerebral cortex

Answer 24

organizes complex move
storage of learned experiences
reception of sensory info

Question 25

motor cortex

Answer 25

voluntary movement

Question 26

cerebellum

Answer 26

monitoring complex movement