Exam 2 Flashcards
ch 6-8, 10-11
Controls the digestive system and other organs
Smooth Muscle
Each level of the hierarchy composed of different neural structures, each performing a different function
Functional Segregation
Fibers produce less vigorous contractions without fatigue, aerobic
Slow-Twitch Muscles
Adapt rapidly, they respond to sudden displacements of the skin, but not to constant pressure
Fast Adapting Receptors
Fluid at the front of the eye; constantly replenished
Aqueous Humor
A synapse between a motor neuron axon and a muscle fiber
Neuromuscular Junction
Each muscle fiber requires information from ? axon but a single axon may innervate many muscle fibers
one
Cancerous; difficult/impossible to remove/destroy completely; remaining tissue continues to grow
Malignant Tumor
Senses external stimuli applied to the skin
Exteroceptive System
A blockage of blood flow
Thrombosis
A specialized sensory neuron will signal the same perceptual information regardless of how its stimulated
Law of Specific Nerve Energies
Interpretation of sensory information by the brain
Perception
Amnesia following a non-penetrating blow to the head
initial stage- may last seconds or minutes, severe cases last much longer
Coma
Changes curvature (accommodation) to refract light on the back of the eye
Lens
Ability to recognize colors despite changes in lighting conditions
Retinex Theory
The act of smelling, the sense of smell
Olfaction
Organized according to the map of the body
Somatotopic
Occurs under the site of impact with an object
Coup Injury
Proprioceptors parallel to the muscle that responds to a stretch
Muscle Spindles
Surgically removable; little risk of regrowth; non-cancerous
Benign tumors
The portion of the electromagnetic spectrum visible to the human eye
On average, humans will respond to wavelengths from about 380-780 nm
Human Visible Spectrum
Hearing ? with age
worsens/decreases
Conversion of raw, incoming sensory information into neural information
Transduction
Damage to the outer ear, tympanic membrane, or middle ear
Conductive Deafness
Fibers produce fast contractions but fatigue rapidly; anaerobic
Fast-Twitch Muscles
A type of proprioceptor that responds to increases in muscle tension
Golgi tendon organ
Integrating a continuous and rapid stream of information into discrete perceptual events/episodes
Temporal Integration
Control movement of the body in relation to the environment
Skeletal Muscles
General goals
Association Cortex
Size/color/shape perceived as consistent across conditions
Perceptual Constancy
Pathology: Gradual loss of neurons in the substantia nigra/loss of dopamine-releasing axons to the striatum
Treatment: L-dopa
Parkinson’s Disease
Ventilate the middle ear space to ensure its pressure is near normal environmental air pressure, drain any accumulated secretions, infection, or debris from the middle ear
Eustachian Tube
Tumors that originate in some other area of the body; carried to the brain via the bloodstream
Metastatic Tumors
Sudden onset cerebrovascular disorder; disruption of blood supply to an area of the brain
Stroke
Area of dysfunctional tissue covering the infarct
Penumbra
Groups of neurons of the auditory system respond to a sound by firing action potential potentially out of phase with another, so when combined, a greater frequency of sound can be sent to the brain to be analyzed
Volley Theory
Seizure that begins at a focal point in the brain, firing in synchronous bursts
Focal Seizure