3.1

Question 1

what does the nervous system do

Answer 1

• it analyses sensory info from the body and the external environment
• it then stores some aspects and makes decisions regarding appropriate responses & behaviours
• it makes motor responses by initiating muscular contractions or hormonal responses by initiating glandular secretions

Question 2

what is the human nervous system made up of

Answer 2

the cns and the pns

Question 3

what is the cns made up of

Answer 3

the brain and spinal cord

Question 4

what does the pns consist of

Answer 4

the peripheral nervous system

Question 5

what is the function of the parts of the cns

Answer 5

brain - processing info
spinal cord - connects brain with pns

Question 6

what is the function of the parts of the pns

Answer 6

peripheral nerves - carries info to and from all parts of the body

Question 7

what controls the voluntary function of the pns

Answer 7

the somatic nervous system

Question 8

what does the sns contain

Answer 8

sensory and motor neurons

Question 9

what do sensory neurons do

Answer 9

take impulses from sense organs to the cns

Question 10

what do motor neurons do

Answer 10

take impulses from the cns to muscles and glands

Question 11

what controls the involuntary function of the pns

Answer 11

automatic nervous system

Question 12

what does the ans consist of

Answer 12

sympathetic & parasympathetic systems

Question 13

are the parasympathetic and sympathetic systems antagonistic

Answer 13

yes

Question 14

define antagonistic

Answer 14

having opposite effects

Question 15

what does the sympathetic system do

Answer 15

speeds up heart and breathing rate

slows down peristalsis and production of intestinal secretions

Question 16

what does the parasympathetic system do

Answer 16

slows down heart and breathing rate

speeds up peristalsis and production of intestinal secretions

Question 17

effect of the sympathetic system on blood flow to muscles

Answer 17

increases it (vasodilation providing more oxygen)

Question 18

effect of the parasympathetic system on blood flow to muscles

Answer 18

decreases (vasoconstriction)

Question 19

effect of the sympathetic system on blood flow to digestive organs

Answer 19

decreases (vasoconstriction)

Question 20

effect of the parasympathetic system on blood flow to digestive organs

Answer 20

increases (vasodilation)

Question 21

what are neural pathways

Answer 21

neurons which are connected to each other through synapses

Question 22

what do neural pathways allow to occur

Answer 22

more complex interactions

Question 23

what are the 3 main types of neural pathways

Answer 23

• converging
  -diverging
• reverberating

Question 24

what happens in a converging neural pathway

Answer 24

impulses from several neurons travel to one neuron

Question 25

what do converging neural pathways do

Answer 25

increase the sensitivity to excitatory or inhibitory signals

Question 26

what happens in a diverging neural pathway

Answer 26

impulses from one neuron travel so several neurons, so affecting more than one destination at the same time

Question 27

what do diverging neural pathways allow

Answer 27

they allow us to coordinate control

Question 28

give example of converging neural pathway

Answer 28

rod cells in the retina of the eye

Question 29

give example of diverging neural pathway use

Answer 29

threading a needle or writing

Question 30

what happens in a reverberating pathway

Answer 30

neurons later in the pathway link with earlier neurons high sends the impulse back through the pathway

Question 31

what do reverberating pathways allow

Answer 31

repeated stimulation of the pathway

Question 32

give an example of reverberating pathway use

Answer 32

breathing