Introduction to A2 Psychology

What is a chemical messenger that carries signals between neurons across a synapse?

• Hormone

• Neurotransmitter

• Enzyme

• Inhibitor

Which of the following is an example of a neurotransmitter?

• Insulin

• Serotonin

• Cortisol

• Melatonin

What is the small gap between two neurons where neurotransmitters travel?

• Axon

• Synapse

• Dendrite

• Receptor

What acts like a "lock" for a neurotransmitter "key"?

• Myelin sheath

• Synapse

• Receptor

• Axon terminal

What is the role of an inhibitor?

• Speeds up neurotransmitter activity

• Blocks or slows down neurotransmitter activity

• Creates new neurotransmitters

• Strengthens synapses

Concordance rates are used to measure:

• How fast neurotransmitters work

• The probability that two people share a trait

• How much serotonin is in the brain

• The level of anxiety in individuals

MZ twins share what percentage of their genes?

• 25%

• 50%

• 75%

• 100%

DZ twins share what percentage of their genes?

• 25%

• 50%

• 75%

• 100%

If MZ twins show a higher concordance rate for a disorder than DZ twins, what does this suggest?

• Environment has a bigger role

• Genes may play an important role

• Concordance rates are unreliable

• Neurotransmitters are the only cause

According to the evolutionary approach, behaviours are shaped by:

• Classical conditioning

• Natural selection

• Defence mechanisms

• Cognitive distortions