Biological Flashcards

1
Q

Frontal lobe

A

The frontal lobe is the area behind the forehead and is heavily involved in intellectual activities such as planning and organising, as well as being involved in personality and the control of emotions and behaviour.

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2
Q

Temporal lobe

A

Nestled behind the ears, this area holds the bulk of our memories and our ability to understand things and speak.

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3
Q

Parietal lobe

A

Responsible for perception, spatial awareness, manipulating objects and spelling. Located at the back of the brain above the ears

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4
Q

Occipital lobe

A

At the very back of the head are the occipital lobes, which are responsible for sight. Any injury to this area can cause partial or complete blindness.

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5
Q

Cerebellum

A

The area of the brain that controls muscle movement, balance and coordination.

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6
Q

Amygdala

A

Two almond-shaped structures located deep within the temporal lobes of the brain. Responsible for memory, decision-making and emotional reactions.

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7
Q

Brain stem

A

Includes the midbrain, medulla and pons. Controls breathing, heart rate, consciousness, blood circulation, basic motor responses. Relays sensory information and regulates the sleep-wake cycle

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8
Q

Hypothalamus

A

Controls the pituitary gland in order to regulate temperature, blood pressure, appetite, wakefulness and sexual arousal. It is also involved in some aspects of memory.

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9
Q

Pituitary gland

A

A pea-sized structure located behind the bridge of nose and below the base of the brain it is responsible for producing hormones such as puberty hormones, thyroid stimulating hormone and stress hormones such as cortisol

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10
Q

Describe the process of synaptic transmission

A

Action potential is an electrical impulse which travels along the pre synaptic neuron .
At the end of this neuron are axon terminals which is where the vesicles are located.
When AP reaches vesicles they release neurotransmitters.
They travel along the synapse where they bind to receptors on the post synaptic cleft.

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11
Q

How do drugs effect the CNS

A

Usually dopamine is broken down by enzymes or returns to pre synaptic neutron.
Drugs cause excess dopamine as they block its reuptake which leaves dopamine in the synapse. This also causes the body to produce less dopamine as it has been triggered unnaturally.
Excess dopamine also causes the receptors to downgrade.

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12
Q

What do painkillers do?

A

Interfere with pain messages going to the brain either at the site of pain or the spine.

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13
Q

How does alcohol affect the brain?

A

Releases GABA which blocks seretonin receptors.
Serotonin inhibits mood so blocking it lifts your mood and gives confidence/calming effect.

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14
Q

Evolutionary theory of aggression

A

Humans aims are to survive long enough to pass on genes and to ensure genes live on in their children
If the desire to achieve these goals is not met humans may become aggressive

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15
Q

Why does evolutionary theory say humans are aggressive

A

-compete with other males and ensure reproductive success
-protect females and offspring
-protect and acquire resources

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16
Q

What is serotonin?

A

Neurotransmitter linked to mood.
Serotonin inhibits aggression

17
Q

Low serotonin =

A

High aggression

18
Q

What is dopamine

A

Neurotransmitter linked to attention and pleasure.

19
Q

Increased dopamine =

A

Increased aggression

20
Q

Reasons for male on male aggression

A

Confidence in paternity and warning to potential rivals

21
Q

Reasons for male on female aggression

A

Deters the female from engaging in bad behaviour

22
Q

Reasons for male on child aggression

A

Males reluctant to spend energy in raising others offspring (stepdads)

23
Q

Thanatos

A

Death instinct

24
Q

Psychodynamic theory:

What is the ID?

A

Most basic part of the psyche and develops first in babies.
Part of the unconscious mind and what’s what it wants if not becomes frustrated.

25
Q

Psychodynamic theory :

What is the ego?

A

Exists in conscious mind so understand the outside the world and consequence of actions
Uses deterred gratification to trick ID and understands punishment

26
Q

Psychodynamic theory :

What is the superego?

A

Uses defence mechanisms to manage aggressive urges from the ID

27
Q

Psychodynamic theory :

What defence mechanisms does the supere ego use

A

Displacement - let anger out on something else
Sublimation - channel aggressive behaviour to socially acceptable behaviour
Repressed - holding it down
Regression
Catharsis

28
Q

Psychodynamic theory :

Ego
Superego
ID

A

Ego - reality
Superego - morality
ID - instincts

29
Q

Raine et at (1997):

Aim?

A

-To find if there was a difference in brain activity if people who have committed murder (NGRI) and non murderers .
-Raine was interested in the role of prefrontal cortex,corpus callosum,amygdala,hypo campus and thalamus

30
Q

Raine et at (1997):

Independent variable

A

Where participant is offender pleading NGRI to murder or a non-murderer in a control groupn

31
Q

Raine et at (1997):

Sample?

A

Independent design
82 people,41NGRI,41 non murderers
Experimental group = 6 with schizophrenia, 23 with brain damage, 3 with drug abuse, 2 with epilepsy, 7 with other disorders
Control group = opportunity sample and 6 with schizophrenia

32
Q

Raine et at (1997):

Procedure?

A

-Raine made sure participants were not on medication for the 2 weeks before - confounding variable
-Participants had 10 mins to practice CPT
-Participants injected with glucose tracker and did CPT for 32 mins

33
Q

Computer assisted tomography scan

A

Series of x rays and combining them to form 3D pictures of the brain. Radioactive dye injected so highlights parts of the brain

34
Q

Positron emission tomography

A

Radioactive glucose material injected. Oxygen and glucose accumulate in parts of brain metabolically active
Most active areas of the brain use glucose and radiation detectors can detect the radioactive areas (using the glucose)

35
Q

Magnetic resonance imaging

A

Magnetic field causes atoms of the brain to change their alignment when magnet is on and emits radio signals when the magnet is turned off. Detector reads the signals and uses them to map structure of brain.

36
Q

Functional magnetic resonance imaging

A

Same as mri but provides antomical and functional info by taking repeated images of the brain.

37
Q

Strengths of correlational research.

A

Can look at relationships between continuous variables rather then the differences.
Procedures can be repeated again so findings can be confirmed
Researchers can investigate naturally occurring variables that may be unethical to test in lab.

38
Q

Weaknesses of correlational research.

A

Can’t demonstrate cause/effect relationships
There could be intervening variables which is why the covariables being studied are linked.