8B

Question 1

how does fMRI work

Answer 1

• it functions in a similar way to MRI, the difference is that it allows brain function to be studied in real time

Question 2

what are the central and peripheral system

Answer 2

• central system consists of brain and spinal chord
• peripheral system consists of the neurons which extend to the rest of the body

Question 3

how does PET work

Answer 3

• uses radioactive traces, which collects areas where there is increased blood flow

Question 4

what is parkinson’s disease

Answer 4

• it is caused by loss of neurones these neurons produce dopamine which is involved in muscle control, less dopamine is released therefore no dopamine will bind to the receptors for sodium ion channels to open, different type of drugs are used: dopamine agonists, Dopamine precursors (L-dopa) and enzyme inhibitors which will prevent breaking down of dopamine

Question 5

what is depression

Answer 5

• people with depression have low levels of serotonin, other chemicals like noradrenaline and dopamine are involved in
• antidepressants work by increasing the levels of serotonin, noradrenaline and dopamine