Biopsychology Flashcards Preview

psychology > Biopsychology > Flashcards

Flashcards in Biopsychology Deck (22):
1

What is the CNS

Complex of nerve tissues that control activities in the body

2

What is the peripheral nervous system?

Nervous system outside the brain, sends nerve impulses from CNS to the rest of the body

3

Somatic nervous system

Sensory and motor neurons

4

Autonomic nervous system

Necessary for vital bodily functions, splits into the sympathetic and parasympathetic

5

Spinal cord

Connected to muscles or glands, contains circuits of nerve cells that enable it to perform reflexes

6

Sympathetic nervous system:

Prepares body for intense activity,

Increased heart rate
Increased BP
Dilated blood vessels

7

Parasympathetic, relaxes body and inhibits processes

Slows heartbeat
Reduces blood pressure
Slows breathing rate

Seratonin increases negative charge

8

Excitators

On switch of nervous system, increase firing

Noradrenaline increases positive charge

9

Inhibitory

Nervous system off switches, decrease likelihood of Neuton firing

10

What does the thyroid gland do?

Releases hormone that control metabolism

11

What does the adrenal gland do?

Releases adrenaline for fight or flight, cortisol increased at stress

12

Role of pancreas in endocrine

Secretes insulin, glycogen and controls digestion

13

What does the pituitary gland do.

Influences the realise of hormones LH FSH, oestrogen,

Men: sperm, progesterone and testosterone

14

What does the COMT gene regulate?

levels of dopamine, high levels of dopamine is more common in OCD

15

Faulty SERT gene

Leads to low levels of serotonin

16

concordance rate in MZ twins with twin study on schizophrenia

35-38%

17

Concordance rate in DZ twins in schizophrenia study

Ranged from 9-26%

18

Evaluation points of biological approach to explaining OCD

Nestadt found that with 80 patients suffering from OCD a first degree relative was 5 times more likely to suffer themselves.

Concordance rate is not 100 in twins so there must be environmental factors

OCD is the form of expression of the same gene which determines Tourette's and autism showing there is no specific gene towards OCD but it a predisposing factor

19

What does SSRIS do?

Increase levels of serotonin released into the synapse

However cause headaches and insomnia

17 studies show that SSRIs perform better than placebos in reducing symptoms but this is only short term treatment

20

What do tricyclics do?

Blocks Neuron that reabsorbs serotonin so it's in the synapse for longer

Drugs require less effort, cheaper, require little monitoring

21

BZS

Reduce anxiety by slowing down activity of CNS and enhancing activity, reacts with GABA and makes it harder for neurons to be stimulated by neurotransmitters

22

Cognitive approach evaluation

Cognitive approach has been used in psychopathology to explain dysfunctional behaved being due to faulty thinking processes,

Cog approach is scientific, experimental methods provide reseachers with rigorous methods of collecting evidence to reach accurate conclusions about how the mind works

Humans unlike computers do forget things or ignore information so can't fully compare the mind to computers which have storage in hard drives

Emotion and motivation has been largely ignored by the cognitive approach