Mid term Vocab part 2 Flashcards
phrenology
• studying bumps on the skull
biological psychology
links between biological and psychological processes
neuron
o nerve cells, or building blocks of our bodys nueral information system
dendrites
recieve information and conduct it toward the cell body
axon
o pass the message through its terminal branches to other nuerons or to muscles or glands
myelin
• layer of fatty tissue that insulates axons and speeds their impulses (insulation)
action potential
• brief electrical charge that travels down its axon
refractory period
• period of inactivity after a nueron has fired
threshold
• the level of stimulation required to trigger a nueral impulse
all or none response
• a nuerons reaction of either firing ( with a full strength response ) or not firing
synapse
o meeting point of to nuerons (synaptic gap or synaptic cleft
neurotransmitters
o chemical messengers that cross the synaptic gaps between nuerons
reuptake
o a nuerotransmitter’s reabsorption by the sending nueron
endorphins
natural opiate like neurotransmitters linked to pain control and to pleasure
agonist
a molecule that, by binding to a receptor site, stimulates a response
antagonist
o a molecule that, by binding to a recptor site, inhibits or blocks a response
Acetylcholine
o enables muscle action, learning, and memory
dopamine
o influences movement, learning, attention, and emotion
serotonin
o affects mood, hunger, sleep, and arousal
norepinephrine
o helps control alertness and arousal
GABA
o a major inhibitory nuerotransmitter
glutamate
o a major excittory nuerotransmitter; involved in memory
endorphins
o “morphine within” natural, opiate like - nuerotransmitters linked to pain control and to pleasure
• explain runners high, ainkilling effects of acupuncture
nervous system
BODY’S SPEEDY, ELECTROCHEMICAL COMMUNICATION NETWORK, CONSISTING OF ALL THE NERVE CELLS OF THE PERIPHERAL AND CENTRAL NERVOUS SYSTEMS
central nervous system
• brain and spinal chord
peripheral nervous system
• responsible for gathering information and for transmitting CNS (central nervous systems) decisions to other body parts
nerves
• electrical cables formed of bundles of axons, link the central nervous system with the body’s sensory receptors, muscs, and glands.
sensory neurons
• nuerons that carry incoming informtion from the sensory recetors to the brain and spinal cord
motor neurons
• nuerons that carry outgoing information from the brain and spinal cord to the muscles and glands
interneurons
• nuerons within the brain and spinal cord that communicate internally and intervene between the sensory inputs and motor outputs
somatic nervous system
• enables voluntary control of our skeletal muscles. or skeletal nervous system,
automatic nervous system
• controls our glands and the muscles of our internal organs, influencing such functions as glandular activity, heartbeat, and digestion (like automatic pilot) can be overridden but usually works in its own
sympathetic nervous system
• arouses and exoands energy if you get startled, this sytem will accelerate your heartbeat, raise your blood pressure, slow your digestion, raise your blood sugar, and coll you with persperation maing you alert and ready for action
parasympathetic nervous sytem
• produce opposite effects as sypathetic nervous system. division of the autonomic nervous sytem that calms the body, conserving its energy
reflex
• a simple, utomatic reponse to a sensory stimulus such as a knee-jerk reaction
endocrine system
• the body’s “slow” chemical communiction system; a set of glands that secrete hormones into the bloodstream
hormones
• chemical messengers that are manufactured by the endorcine glands travel through the bloodstrem and affect other tissues
adrenal glands
• a pair of endocrine glands that sit just above the kidney and secrete hormones (epinephrine and norepinephrine) that help arouse the body in times of stress
pituitary glands
the endocrine system’s most influential gland. Under the influence of the hyothalamus, the pituitary gland regulates growth and controls other endocrine glands
lesion
tissue destruction
EEG
• An amplified recording of the waves of electrical activity sweeping across the brain’s surface. These waves are measure by electrodes placed on the scalp
Shower cap like hat that is filled with electrodes covered with a conductive gel
CT
• Examines the brain by taking x-ray photographs that can reveal bran damage
PET
• Depicts brain activity by showing each brain area’s consumption of its chemical fuel, the sugar glucose
MRI
• Person’s head is put in a strong magnetic field, which aligns the spinning atoms of brain molecules
fMRI
• can reveal the brain’s functioning as well as its structure e
brainstem
• Oldest and innermost region of the brain
Begins where the spinal cord swells slightly after entering the skull
medulla
base of the brain stem; o Here lie the control fro your heartbeat and breathing
thalamus
o Sits atop the brainstem
• A pair of egg-shaped structures that act as the brain’s sensory control center
• Receives information from all the senses except smell and routes it to the higher brain regions that deal with seeing, hearing, tasting, and touching
• Also receives some the higher brain’s replies, which it then directs to the medulla and to the cerebellum
reticular reformation
o Inside your brainstem in-between your ears
• A neuron network that extends form the spinal cord with up through the thalamus
• Filters incoming stimuli and relays important information to other brain areas
• Enables arousal
cerebellum
o Extending form the rear of the brainstem; baseball sized
• Means little brain
Which is what its two wrinkled halves resemble
Enables nonverbal leaning and memory. Helps us judge time, modulate our emotions, and discriminate sounds and textures
Coordinates voluntary movement
limbic system
o Newest and highest regions
• Cerebral hemispheres (the two halves of the brain)
Contains the amygdala, the hypothalamus, and the hippocampus
amygdala
o Two lima bean sizes neural clusters, to aggression and fear
• Linked to emotion
Perceptions of these emotions
hypothalamus
o Just below the thalamus
• An important link in the command chain governing bodily maintenance
Some clusters influence hunger; others regulate thirst, body temperature, and sexual behavior
• All together, they help maintain a steady internal state
cerebral cortex
Thin surface layer of interconnected neural cells
• It is your brain’s thinking crown
glial cells
• Cells in the nervous system that support, nourish, and protect neurons; they may also play a role in leaning and thinking
frontal lobe
portion of the cerebral cortex lying just behind the forehead; involved in speaking and muscle movements and in making plans and judgements
parietal lobes
lying atop the head and toward the rear; receives sensory input for touch and body position
occipital lobe
lying at the back of the head; includes areas that receive information from the visual fields