Molecule 9,10,11,12,13,14,15 Flashcards
Biological psychology
Scientific study of the links between biological & psychological processes
Neurons
Nerve cell
The basic building block of the nervous system
Receive , carry , pass
Dendrites
A neuron branching extensions that receive messages and conduct impulses towards the soma
Axon
The neuron extension that passes messages through its branches to other neurons
Myelin sheath
A fatty tissue layer ; encasing the axons of some neurons ; enables vastly greater transmission of speed as neural impulses hop
Action potential
A neural impulse ; a brief electrical charge that travels down an axon
Threshold
The level of stimulation required to trigger a neural impulse
All or none response
A neurons reaction of either firing or not firing
Synapse
The junction between the axon Tio of the sending neuron & the dendrite of cell body of the receiving neuron
Neurotransmitters
Chemicals contained in the terminal buttons that enable neurons to communicate
Release into synapse along dendrites to the next neuron
Reup take
A neurotransmitter re absorption by the sending neuron
Endorphins
Natural opiates life neurotransmitters linked to pain control & positive emotions
Inhibitory
Agonist
A molecule that by binding to a rector site , stimulates a response
Antagonist
A molecule that by binding to a receptor sits , inhibits or blocks a response
Nervous system
The body’s speedy communication network consisting of all the nerve cells of the peripheral & central nervous system
Central nervous system
The Brian & spinal cord
Peripheral nervous system
The sensory & motor neurons that connect the central nervous system to the rest of the body
Nerves
Bundled axon that form neural cables connecting the central nervous system w muscles , glands , & sense organs
Sensory neurons
Neurons that carry incoming info from the sensory receptors to the brain & spinal cord
Motor neurons
Neurons that carry outgoing info from the brain & spinal cord to the muscles & glands
Interneurons
Neurons within the brain & spinal cord that communicate internally & intervene between the sensory inputs
Somatic nervous system
The division to the peripheral nervous system that controls the body’s skeletal muscles
Autonomic nervous system
The part of the peripheral nervous system that controls the glands and the muscles of the internal organs
Sympathetic - arouses
Parasympathetic - calms
Sympathetic nervous system
The division of the autonomic nervous system that arouses the body, monolingual its energy in stressful situations
Parasympathetic nervous system
The division of the autonomic nervous system that calms the body ; conserving energy
Reflex
A simple automatic response to a sensory stimulus
Endocrine system
The body slow chemical communication system ; a set of glands that secrets hormones into the bloodstream
Hormones
Chemical messengers that are manufactured by the endocrine glands Ravel through the bloodstream & affect other tissues
Adrenal glands
A spur of endocrine glands that sit just above the kidneys & secrete hormones that help arouse the body in times of stress
Pituitary gland
The endocrine system most influential gland under the influence of the hypothalamus ; the pituitary regulates growth & controls glands
Lesion
Tiny clusters of brain cells ; leaving the surrounding tissue unharmed
Brain stem
Oldest part & central core of the brain ; beginning where the spiral cord swells as it enters the skull ; responsible for automatic survival factors
Medulla
The base of the brain stem ; controls heart beat & breathing
Thalamus
The brain sensory control center ; located on top of the brain stem ; it directs messages to the sensory receiving areas in cortex & transmits to replies to the cerebellum & medulla
Reticular formation
A nerve network that travels through the brain stem & thalamus & plays an important role in controlling arousal
Cerebellum
The little brain at the rear of brain stem ; functions include processing sensory input , coordinating movement & balance & enabling non verbal learning & memory
Amygdala
Two Lima bean sized neural clusters in limbus system ; linked to emotion
Hypothalamus
A neural structure lying below the thalamus , it directs several maintenance activities , help govern the endocrine system via the pituitary gland & is lined to emotion , reward , & eating
Corpus Callosum
Axon divers connecting the two cerebral hemispheres
Pons
Helps w wake & sleep cycles
Spinal cord
Pathway for neural divers traveling to & from brain ; controls simple reflexes
Cerebral cortex
Ultimate control & info processing center
Glial cells
Cells in nervous system that support , nourish & protect neurosurgery; they may also play a role in learning & thinking
Frontal lobes
Portion of the cerebral cortex lying just behind the forehead
Involved in speaking & muscles movements in making plans & judgements
Parietal lobes
Portion of the cerebral cortex lying at top of the head & toward the rear ; revives sensory input for touch & body position
Occipital lobes
Portion of the cerebral cortex lying at the back of head ; includes areas that receive info from the visual fields
Temporal lobes
Portion of the cerebral cortex lying above ears
Includes auditory areas & receiving info from opposite ear
Motor cortex
An area at the rear of frontal lobes that controls voluntary movements
Somatosensory cortex
Area at the front of the parietal lobes that registers & process body touch & movement sensations