Summary: Psychologie

Read the summary and the most important questions on Psychologie

• 1 Genes and evolution

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• What is the function of methyl?

  It attaches to a particular gene so it can be turned onn

• Why are some genes expressed and some are not?

  This is controlled by biochemical environment inside the cel, which is controlled by the biochemical environment outside the cel, timing, development, the overall envirionment, experience nd behaviour.

• What is the proof of naturel selection?

  1. Variation among individuals of a population
  2. Individuals with a certain trait survive and reproduce at higher rates than others
  3. Trait with advantage is passed from parents to offspring

• What is evidence for naturel selection?

  1. Fossil records
  2. Resemblance between genomes of variou organisms
  3. Pseudogenes: non-functioning gene (non longer needed)
  4. Distribution of specief around the world

• 2 Brain and nervous

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• What kind of cells can you find in the brain and what are their functions?

  Gia cellls are supportive
  Neurons are fro receiving and transmitting information

• What doe sthe all-or-none law mean?

  Neurons do fire or do not fire. The intensiy varies because of the variations in (1) the number of neurons firing and variation in (2) firing rate.

• How do neuros interact?

  Throug synaps or chemicals

• How will a neurotransmitter be terminated?

  1. Autoreceptors: This ill count the amount of neurotransmitters, when the neuron rate is high it will give signals to be stopped.
  
  2. Synaptic reuptake: The neuron is reused.
  
  3. Enzymes: Enzymes deactivate the neurons.

• The  binding of a neurotrasmintter with a receptor produces an excitatory or inhibitatory signal. What does that mean?

  Excitatory: actionpotential increases
  Inhibitory: actionpotential decreases

• How does an agonist work?

  1. Increase of precursor (or neurotransmmitter)
  2. Counteracting the cleanup enzymes
  3. It's blocking the re-uptake
  4. It's mimicking the transmitter's action