Unit 1 Ap Psychology

Psychology

The science of mental and behavioral processes.

Epigenetic

How the environment affects your gene expression(on/off).

Interaction

How different factors effect an outcome.

Fraternal (Dizygotic) Twins

Twins from separate fertilized eggs *DO NOT HAVE IDENTICAL DNA.

Identical (Monozygotic) Twins

Twins from the same egg that split *HAVE IDENTICAL DNA.

Environment

The non-genetic influences on our psychology.

Hereditary

The transfering of characteristics and genes from parents to offspring.

Genes

The traits parents pass down.

Genome

The complete set of genes in an organism.

Mutation

Errors in gene replication that leads to a change in the organism.

Natural Selection

Survival of the fittest-only the good traits get passed on.

Evolutionary Psychology

How evolution affects our psychology as a species.

Behavior Genetics

How our genes and environment affect our psychology on a personal level.

Nature-Nurture Issue

Is our psychology because of our biology or because of how we were raised?

Family Studies

Analyze traits that might be shared biologically in families.

Twin/Adoption Studies

Analyzes traits that might be because of shared genes and/or environments.

Reflexes

Automatic responses to stimuli.

Nervous System

The body’s electrochemical communication network(all the nerves in the peripheral and central nervous system)-takes in/sends information, makes decisions.

Central Nervous System(CNS)

The brain and spinal cord-makes decisions.

Peripheral Nervous System(PNS)

Sensory and motor neurons that connect CNS to the rest of the body.

Nerves

Bundled axons connecting the CNS to muscles, glands, and sensory organs.

Sensory(Afferent)Neurons

Carries incoming information from the body’s tissues and sensory receptors to the brain and spinal cord.

Motor(Efferent)Neurons

Neurons that carry information out of the brain into the body.

Interneurons

Neurons in the brain/spinal cord-they communicate internally and process the info coming from the sensory inputs and outputs.

Somatic/Skeletal Nervous System

The PNS system that controls the skeletal muscles.

Autonomic Nervous System(ANS)

Controls the glands and muscles of internal organs; sympathetic division arouses, parasympathetic calms.

Sympathetic Nervous System

The part of the ANS that stimulates and uses energy to move the body.-Fight or Flight

Parasympathetic Nervous System

The part of the ANS that cals the body and preserves its energy.

Why is the spine a part of the CNS?

It acts as a two way street for information inputs and outputs/reactions with neutral fibers.

Neuron

A nerve cell-building blocks of the nervous system.

Cell Body

The part of the neuron that has it’s nucleus.

Dendrites

The little “hairs” receiving messages. 

Axon

Connects a neuron to other neurons, muscles, or glands, and passes messages.

Myelin Sheath

Covers the axon and helps speeds up messages.

Glial Cells(Glia)

Nourishes, supports, and protects neurons; also play a role in thinking, learning, and memory.

Action Potential

Impulses.

Threshold

How much of a trigger is needed to set off an impulse.

All-Or-None-Responses

If stimulation becomes too high, the neuron either completely fires or not at all. 

Refractory Period

A break for a neuron after it fires off-needs to regenerate axon first.

Synapse

A small gap where electrical signals are being sent from the neuron.

Neurotransmitters

Chemical messengers that go between neurons-binds to the receptors of the other neuron and makes the decision to act or not.

Reputake

Excess neurons being disposed of(either absorbed or broken down).

Endorphins

Natural-pain control and pleasure.

Agonist

A molecule that increases the neurotransmitter’s action.

Antagonist

A molecule that blocks a neurotransmitter’s action

Endocrine System

A set of glands and fats that secrete hormones into the bloodstream.

Hormones

Chemical messengers created by the endocrine glands that affect other tissues.

Endocrine System in a Nutshell

Hypothalamus→Pituitary Gland→Other Glands→Hormones

Hallucinogens

Psychedelic drugs that affect perception.

Near-Death-Experience

A state of consciousness near death.

Stimulants

Drugs that excite neural activity and speeds up bodily functions. Ex: Caffeine(An antagonist of adenosine receptors, and nicotine, Agonist for nicotinic acetylcholine receptors")

What are some examples of stimulants?

Nicotine, Caffeine, Cocaine, Molly

Barbiturates(Tranquilizers) 

Depressants that lower CNS activity. They bring down anxiety, but also judgement and memory-AFFECTS GABA.

Opioid 

Opium and Co. Depresses neural activity, lessens pain and anxiety.(Fentanyl, Oxycotin, Morphine-too much makes the brain stop producing its own opium)

Tolerance

How much of a substance your body needs to feel the effects.

Addiction

A dependency on a substance to feel normal.

Withdrawal

Feeling uncomfortable without a substance.

Depressants

Drugs that lessen neural activity and body functions.

Psychoactive Drugs

Chemicals that alter the brain, leading to changes in perceptions and moods

What are the 3 of psychoactive drugs?

Depressant, Stimulant, Hallucinogen.

What are some examples of depressants?

Alcohol.

What are some examples of hallucinogens?

LSD, Marijuana.

Seretonin

Sleep regulation, Emotional stability/mood regulation, Appetite control, Nausea reduction, Energy-Too little=Sleep problems and depression.

Dopamine 

Movement, Motivation, Drive, Energy. Too little=Depression, Mood Issues.

Norepinephrine

Fight for Flight, Energy levels, Alertness-too much=anxiety, too little=depression

Acetylcholine

Muscle movements and contractions, memory/learning, Emotions and

GABA

Inhibits brain activity,reduced anxiety, makes you calm-low=anxiety.

Endorphins

Pain relief, pleasure, well-being(exersize)-too little=substance abuse and chronic pain.

Glutamate

Learning, memory, cognition-too much=epilepsy/ migraines, too little=alzheimer’s.

Substance P

Pain receptors.

Types of Drugs+Effects

Steps of Firing a Neuron

Chemical is resting at -70 Mv-Stimulus happens, Mv is -55-depolarization until 40 Mv(N is in, then action potential, then repolarization(K out)-Hyperpolarization, Refractory period, repeat.

Breakdown of Major NTmitters

Nodes of Ranvier

Gaps in the Meylin Sheath.

Terminal branch

Tunnels at the end of the axon.

Terminal Button/Synaptic Knob

Structure at the end of an axon terminal branch. 

Synaptic vesicles

Sacs that hold the chemicals then burst.

Synaptic Space/Cleft

The tiny gap between the axon terminal of one neuron and the dendrites of the next neuron.