KA1 Divisions Of The Nervous System And Neural Pathways

Question 1

Nervous system is made up of

Answer 1

Brain
Spinal cord
Nerves

Question 2

CNS consists of

Answer 2

Brain
Spinal cord

Question 3

PNS consists of

Answer 3

somatic nervous system SNS
autonomic nervous system ANS

Question 4

SNS contains

Answer 4

sensory and motor neurons

Question 5

Sensory neurons

Answer 5

take impulses from sense organs to the CNS

Question 6

Motor neurons

Answer 6

take impulses from the CNS to muscles and glands

Question 7

Sensory and motor neurons control

Answer 7

the voluntary movement of skeletal muscles

Question 8

Converging neural pathway

Answer 8

impulses from several neurons travel to one neurons
this increases the sensitivity to excitatory or inhibitory signals
(enough neurotransmitter provided to trigger a sensory neuron to send nerve impulse to brain)

Question 9

Summation

Answer 9

a series of weak stimuli can produce enough neurotransmitter to trigger an impulse in a post synaptic neurons in a converging neural network

Question 10

Diverging neural pathway

Answer 10

impulses from one neurons travel to several neurons so affecting more than one destination at the same time
Allows for dine control or simultaneous response

Question 11

Reverberating pathway

Answer 11

neurons later in the pathway link with earlier neurons, sending the impulse back through the pathway
this allows repeated stimulation of the pathway

Question 12

Impulse

Answer 12

Arrival of stimuli —> activation of receptor —> nerve impulse carried by sensory neurons in sensory pathways —> information processing in CNS —> nerve impulses carried by motor neurons in motor pathways —> response by effector

Question 13

During fight or flight

Answer 13

Heart rate and blood pressure increase
Blood supplies diverted to skeletal muscles and away from gut and skin