Nervous system

Question 1

what are the nervous system functions (3)

Answer 1

temperature regulation
heart rate
blood pressure

Question 2

what is the CNS comprised of (2)

Answer 2

brain and spinal cord

Question 3

what is the PNS comprised of (4)

Answer 3

sensory and motor nerves
SNS and ANS

Question 4

what is the function of the SNS

Answer 4

respond to the external environment and sends info to the brain then muscles resulting in involuntary muscle contraction (skeletal)

Question 5

what is the function of the ANS

Answer 5

receives info about internal environment and sends info to the involuntary cardiac and smooth muscle

Question 6

what is the function of the medulla oblongata (3)

Answer 6

regulate ANS
Primitive function (heartbeat, breathing rate, digestion)
involuntary regulation

Question 7

what is the function of the cerebellum (3)

Answer 7

coordination and balance
mediate ‘how to do something’
procedural memory

Question 8

what is the function of the corpus callosum

Answer 8

integrate information between the two hemispheres of the brain

Question 9

what is the function of the hypothalamus (2)

Answer 9

Temperature
appetite regulation

Question 10

what is the function of the amygdala

Answer 10

process emotion

Question 11

what is the function of thalamus (2)

Answer 11

regulate consciousness and feeling of pain

Question 12

what is the function of the hippocampus

Answer 12

forms organises and stores memories

Question 13

what is the function of the limbic system

Answer 13

regulates involuntary responses by communicating with the ANS

Question 14

what is the function of the cerebrum

Answer 14

visual centre
auditory centre
sense of touch
motor response
divided into lobes for each sense and motor movement

Question 15

what is the function of the association areas of the brain (2)

Answer 15

to make sense of sensory information and store memories to help process info.
make sense of visual association and object recognition.

Question 16

what does the neuron structure consist of (4)

Answer 16

dendrites - projections of nerve fibres sending nerve impulses to the cell body
cell body - contains nucleus, etc…
axon - carries nerve impulses away from the cell body
myelin sheath - insulator increasing impulse speed.

Question 17

what are the 3 types of neurons

Answer 17

inter/relay
sensory
motor

Question 18

how is action potential produced

Answer 18

sodium and potassium flow across the cell membrane running across neurons from dendrite to axon terminal.

Question 19

what is the synapse

Answer 19

the gap between two neurones dendrite and axon terminal

Question 20

what are synaptic vesicles

Answer 20

pouches found in the axon terminal containing neurotransmitters which are released into the gap when stimulated by a nerve impulse.

Question 21

what happens as a neurotransmitter is released (3)

Answer 21

neurotransmitter is released from the synaptic vesicle.
neurotransmitter binds with receptors on the dendrite triggering nerve impulses in the next neurone.
neurotransmitter is then broken down and reabsorbed in the axon terminal for reuse.