8 the brain

Question 1

define the brain.

Answer 1

highly organised mass of interneurones connected with the rest of the nervous system by motor and sensory neurones

Question 2

what is grey matter?

Answer 2

‘outside’ nerve cell bodies, synapses

Question 3

what is white matter?

Answer 3

axons which connect parts of the brain

Question 4

what connects the cerebral hemispheres?

Answer 4

corpus callosum

Question 5

what area is the frontal lobe found?

Answer 5

front

Question 6

what area is the parietal lobe found?

Answer 6

middle top

Question 7

what area is the occipital lobe found?

Answer 7

back

Question 8

what area is the temporal lobe found?

Answer 8

below

Question 9

where is the hypothalamus found?

Answer 9

just below the middle part/ thalamus

Question 10

role of hypothalamus:

Answer 10

thermoregulation, maintains body temp, endocrine gland, sleep, thirst hunger regulation

Question 11

role of cerebellum:

Answer 11

coordinating movement and balance

Question 12

role of cerebrum:

Answer 12

Thoughts
Emotion
Seeing
Hearing

Question 13

role of hippocampus:

Answer 13

long-term memory + learning

Question 14

role of medulla oblongata:

Answer 14

heart rate , breathing rate and CO2 levels

Question 15

what does MRI?

Answer 15

magnetic resonance imaging

Question 16

what do MRIs detect?how?

Answer 16

• detect soft tissue
• radio waves turned on and off →atoms are release energy to create images, thin slices= 3D image

Question 17

why are MRIs useful?

Answer 17

produces images with high resolution, the brain tumour = lighter area

Question 18

what does fMRI stand for?

Answer 18

functional magnetic resonance imaging

Question 19

how do fMRIs work?

Answer 19

-oxyhaemoglobin does not absorb the radio waves, deoxyhaemoglobin does

Question 20

what does less absorption mean from an fMRI?

Answer 20

less absorbed= more haemoglobin= more uptake