MYTUTOR SUBJECT ANSWERS

975 views

Cognitions, emotions and behaviours are products of the anatomy and physiology of our nervous and endocrine systems. There are biological correlates of behaviour.

Martinez & Kesner (1991) – An experiment to determine the role of neurotransmitter acetylcholine on memory formation (in hippocampus) of mazes on rats. Rats were trained to go through a maze and receive food at the end. After, one group of rats was injected with scopolamine which blocks acetylcholine sites thus decreasing available acetylcholine, a second group of rats with physostigmine, which blocks production of cholinesterase that removes acetylcholine from synapse and return neuron to resting state and the control group was injected nothing. The group injected scopolamine was slower finding their way around maze than the other two groups, and the group injected with physostigmine ran through the maze and made less errors. This shows that neurotransmitter acetylcholine plays an important role in memory formation.

Evaluation: use of experimental method with a control group made it possible to establish a cause-and-effect relationship between levels of acetylcholine and memory. It is questionable to what extent can this be applied to humans à shown that those with Alzheimer’s disease have damaged acetylcholine-producing cells. The experiment was harmful for rats.

 

Kasamatsu & Hirai (1999) – the aim was to investigate how sensory deprivation affects the brain. A group of Buddhist monks went on a 72-hour pilgrimage to a mountain where the didn’t eat, drink, speak… After 48 hours they began to have hallucinations, seeing ancestors etc. The researchers took blood samples before and after the monks reported having hallucinations. Serotonin levels increased in their brain, activating hypothalamus and frontal cortex, resulting in hallucinations. Serotonin is responsible for sleep, arousal levels and emotion.

Evaluation: criticism of reducing explanation of behaviour on neurotransmitters alone à reductionist. However, cause-and-effect relationship is uncertain; maybe hallucinations triggered release of serotonin. It cannot be generalised, because monks are a distinctive group.

Zana Katarina L. IB Biology tutor, IB Maths tutor, IB Psychology tutor

2 years ago

Answered by Zana Katarina, an IB Psychology tutor with MyTutor


Still stuck? Get one-to-one help from a personally interviewed subject specialist

6 SUBJECT SPECIALISTS

£24 /hr

Emily P.

Degree: Psychology (Bachelors) - Exeter University

Subjects offered:Psychology, English Literature+ 4 more

Psychology
English Literature
English Language
Chemistry
Biology
-Personal Statements-

“Experienced tutor currently studying at a top UK university, I am excited to help you achieve the best grades for you!”

£30 /hr

Marcella M.

Degree: Psychology and neuroscience (Bachelors) - Cambridge University

Subjects offered:Psychology, Italian+ 4 more

Psychology
Italian
Extended Project Qualification
English Language
-Personal Statements-
-Oxbridge Preparation-

“Cambridge University student with a passion for learning and interested in making it enjoyable and productive for everyone!”

MyTutor guarantee

|  2 completed tutorials

£20 /hr

Taranah G.

Degree: Psychology (Bachelors) - Edinburgh University

Subjects offered:Psychology, German+ 3 more

Psychology
German
English and World Literature
English Language

“About me: I am a Psychology student at the University of Edinburgh. I am passionate about working with and learning about people, which in essence is what Psychology is about, and I would love for you to feel the same way! As a child ...”

About the author

£20 /hr

Zana Katarina L.

Degree: Psychology (Bachelors) - Durham University

Subjects offered:Psychology, Maths+ 1 more

Psychology
Maths
Biology

“Top tutor from the renowned Russell university group, ready to help you improve your grades.”

MyTutor guarantee

You may also like...

Posts by Zana Katarina

Describe one example of transient polymorphism.

Discuss the relative importance of genetic and cultural evolution in the recent evolution of humans.

Analyze the changes in concentration of atmospheric carbon dioxide using historical records.

Behaviour can be innate because it is genetically based and can be inherited.

Other IB Psychology questions

IB Psychology Exam Notes and Tips

Examine one evolutionary explanation of behaviour.

Outline some of the symptoms of clinical depression

What is the diathesis-stress model?

View IB Psychology tutors

We use cookies to improve your site experience. By continuing to use this website, we'll assume that you're OK with this. Dismiss

mtw:mercury1:status:ok