Class 2 - Consciousness, Genetics, Evolution, Nervous, Endocrine, Brain Flashcards
Nervous system
body’s speedy, electrochemical communication network; uses neurotransmitters as mssengers
Sensory (afferent) neurons
carry info from tissues and sensory receptors to the central nervous system
Motor (efferent) neurons
carry info from central nervous system to muscles and glands
Interneurons
within central nervous system; process info between sensory inputs and motor outputs
Central nervous system
brain and spinal cord
Reflex
a simple, automatic response to a stimulus
Peripheral nervous system
somatic nervous system, autonomic nervous system
Somatic nervous system
voluntary control of skeletal muscles
Autonomic nervous system
controls glands and internal-organ muscles; sympathetic nervous system and parasympathetic nervous system
Sympathetic nervous system
arouses body and expands energy
Parasympathetic nervous system
calms body, conserves energy; rest and digest
Endocrine system
body’s slower chemical communication system
Hormones
messengers made by glands, travel through bloodstream, and affect tissue
Pituitary gland
regulates growth and controls other endocrine glands
Oxytocin
hormones and a neurotransmitter that is involved in childbirth and breast-feeding; associated with empathy, trust, sexual activity, and relationship-building.
EEG
measure electrical activity in neurons
MEG
records magnetic fields from the brain’s natural electrical currents
CT (CAT)
generate x-ray of the head
PET
Tracks where radioactive glucose goes while the brain is performing a task
MRI
uses magnetic fields and radio waves to provide map of brain structure
fMRI
measures blood-flow to brain regions by comparing MRI scans; reveals function and structure
Brain stem
medulla and pons
Medulla
heartbeat and breathing
Pons
helps coordinate movements and control sleep
Reticular formation
filters incoming stimulus and relays information; controls arousal
Thalamus
relays sensory information
Cerebellum
nonverbal learning; skill memory; coordinates voluntary movement and balance
Limbic system
amygdala, hypothalamus, hippocampus
Amygdala
linked to emotion
Hypothalamus
temperature, eating/drinking; controls pituitary glands; emotion/reward
Hippocampus
helps process/storage explicit (conscious) memories of facts and events
Cerebral cortex
frontal lobes, parietal lobes, occipital lobes, temporal lobes
Frontal lobes
speaking, muscle movements; making plans and judgments; prefrontal cortex, motor cortex
Parietal lobes
receives sensory input for touch and body position; somatosensory cortex
Occipital lobes
receive information from visual fields; visual cortex
Temporal lobes
receive information from auditory areas; auditory cortex
Association areas
not involved in primary motor or sensory functions, involved in higher mental functions; Broca and Wernicke area
Broca’s area
speaking
Wernicke’s area
understanding