biospych part 2 Flashcards
automatic muscular responses
to stimuli
-Reflexes-
A graded depolarization is known as an ___. It results from a flow of sodium ions into the neuron. increase the likelihood of a postsynaptic action potential occurring
Excitatory postsynaptic potential
(EPSP).
is a network of nerves that helps your body activate its “fight-or-flight” response . This system’s activity increases when you’re stressed, in danger or physically active
sympathetic nervous system
chemical messengers in the body. Their job is to transmit signals from nerve cells to target cells. These signals help regulate bodily functions ranging from heart rate to appetite
neurotransmitters
bursts of release of neurotransmitters from the presynaptic neuron.
exocytosis
measures the small changes in blood flow that occur with brain activity. it is less expensive and risky in comparison with PET scans
functional magnetic resonance imaging
-researchers examine detailed brain anatomy in living people. One method is ______, better known as ______
computerized axial tomography, CAT scan
using light to control a limited
population of neurons.
Optogenetics
records electrical activity of the brain through electrodes—ranging from just a few to more than a hundred—attached to the scalp
Electroencephalograph (EEG)
the removal of a brain area, generally
with a surgical knife.
Ablation
instead of measuring electrical activity, it measures the faint magnetic fields generated by
brain activity.
Magneto encephalograph (MEG)-
provides a high-resolution image of activity in a living brain by recording the emission of radioactivity from
injected chemicals
Positron-emission tomography (PET)
The _______ is a thick bundle of nerve fibers that connects the two cerebral hemispheres, allowing them to communicate. It is also involved in movement control, cognitive functions, and vision
corpus callosum
