Nervous System

Question 1

CNS consists of

Answer 1

brain and spinal cord

Question 2

CNS function

Answer 2

interpreting info and making decisions

Question 3

PNS consists of

Answer 3

all the other nerves

Question 4

PNS function

Answer 4

message transport system

Question 5

what does a nerve consist of

Answer 5

dendrites, cell body, axon, mylein, axon terminal

Question 6

function of nerve

Answer 6

receives and send messages from the body to the brain and vice versa

Question 7

purpose of mylein

Answer 7

to quicken the nerve signals

Question 8

what cells make mylein

Answer 8

CNS - oligodendrocytes
PNS - schwann cells

Question 9

what are action potentials

Answer 9

rapid change in voltage across membrane

Question 10

sodium/potassium in cell

Answer 10

more potassium on inside

Question 11

action potential method

Answer 11

threshold met - depolarisation (sodium moves into cell) - membrane potential rises to +30 - sodium channels close, potassium ones open - repolarisation - channels close, return to resting potential

Question 12

rare synapse

Answer 12

electrical

Question 13

chemical synapse

Answer 13

action potential arrives at axon terminal - neurotransmitter released into synaptic cleft - binds to receptors - receptors open allowing specific ion to move across

Question 14

frontal lobe

Answer 14

motor movement, predicting outcomes

Question 15

temporal lobe

Answer 15

speech, hearing, memory

Question 16

occipital lobe

Answer 16

vision

Question 17

parietal lobe

Answer 17

sensory perception

Question 18

brain stem function

Answer 18

breathing, consciousness, blood pressure, heart rate, and sleep.

Question 19

components of relfex arc

Answer 19

stimulus, sensory neuron, receptor, motor neuron, effector, response

Question 20

parasympathetic NS

Answer 20

rest and digest

Question 21

sympathetic NS

Answer 21

fight or flight

Question 22

role of ANS in homeostasis

Answer 22

regulation of blood pressure, responses to food

Question 23

key role of sympathetic system

Answer 23

responding to dangerous or stressful situations

Question 24

key role of parasympathetic system

Answer 24

decreases respiration and heart rate and increases digestion

Question 25

key structures of the eye

Answer 25

pupil, iris, eyelid, cornea, lens, retina

Question 26

what do rods do in the eye

Answer 26

non colour vision, low light vision

Question 27

what do cones do in the eye

Answer 27

colour vision, high resolution, bright light

Question 28

afferent

Answer 28

sensory neuron

Question 29

efferent

Answer 29

motor neuron