Module 2: Biological Bases of Psychology

Question 1

Cell Body

Answer 1

Part of neuron containing nucleus - allows it to live

Question 2

Dendrite

Answer 2

Bushy fibers that receive and integrate information - directing it to cell Body

Question 3

Axon

Answer 3

Single length fiber that delivers info to the dendrites

Question 4

Myelin Sheath

Answer 4

Fatty tissue layer that insulates and increases speed of impulses

Question 5

Vesicles

Answer 5

Small sacs with terminal buttons containing neurotransmitters

Question 6

Synapses

Answer 6

Space between each Neuron

Question 7

Nodes of Ranvier

Answer 7

gaps between myelin sheath where sodium and potassium pass through during action potential

Question 8

afferent neuron

Answer 8

receives info from the sensory receptors and sends it back to the brain - sensory neurons

Question 9

efferent neuron

Answer 9

send info from the brain to the body - motor neurons

Question 10

EEG

Answer 10

Works by reading electrical signals within the brain running on the surface of the brain

Question 11

MEG

Answer 11

Measures magnetic fields generated by impulses fired - speed and strength of the magnetic fields firing

Question 12

CT

Answer 12

Takes x ray photographs - can determine where brain damage may have happened

Question 13

PET

Answer 13

A person is fed temporarily radioactive glucose, which then is consumed by the brain activity - Active neurons consume glucose, and this can show where the brains are most active

Question 14

MRI

Answer 14

Atoms in the brain are aligned, and then a radio wave pulse disorients the atoms. The disoriented atoms then emit a signal when they return back to normal - Provides accurate image of soft tissues

Question 15

fMRI

Answer 15

It can reveal the functioning as well as the structure by detecting where blood flow is going, which is where the brain is activated