2020 Anatomy Physiology Lab Chapter 4 PDF

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Chapter 4...

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A test result of 20/40 is better or worse than normal vision? Worse Presbycusis old hearing/ loss of high frequency and frequencies involved with speech Which hearing test done in lab used a ticking clock? (auditory) acuity test The enlarged region at the base of each semicircular canal is called? Ampulla What is the device used in the audiometry test? Audiometer Audiometry determination of hearing acuity by exposing each ear to sound stimuli of varying frequency and intensity The lab test for equilibrium that spun a subject quickly and halted them abruptly to see nystagmus is called Barany test What do the ceruminous glands produce? Wax The crista ampullaris consists of a tuft of hair cells covered with a gelatinous cap The gelatinous cup of the crista ampullaris is called the ampullary cupula It is thought that high pitched sounds peaked on the basilar membrane close to the oval window It is thought that low pitched sounds peaked on the basilar membrane close to the apex of the cochlea Found on the walls of the saccule and the utricle, the maculae consist of hair cells embedded in an otolithic membrane and otoliths The crista ampullaris of the semicircular canals are responsible for the perception of what type of equilibrium dynamic or static? Dynamic The maculae of the saccule and utricle are responsible for the perception of what type of equilibrium, dynamic or static? Static In this condition, if large amounts of pus or fluid accumulate in the middle ear cavity, an emergency procedure called myringotomy may be used to relieve the pressure The involuntary rolling of the eyes in any direction or the trailing of the eyes slowly in one direction followed by rapid movement in the opposite direction is called nystagmus Inflammation of the middle ear is called otitis media Otolithic membrane is a gelatinous mass that is part of the maculae Otolith are small grains of calcium carbonate found in the maculae

What is the cause of presbycusis? Gradual deterioration and atrophy of spinal organ/ damage to the hair cells in the organ of corti Name 1 test for deafness performed in lab Weber test Does vision play a role in equilibrium? Yes The lab test that checked equilibrium with eyes opened and closed by drawing lines on the blackboard as the subject swayed is called Romberg test The rubber mallet/hammer was used to perform what hearing test? Weber test What hearing test was performed using the tuning forks? Weber test Vertigo sensation of dizziness and rotational movement when that movement is not occurring or has ceased Other than the equilibrium apparatus of the ear, what other parts of the body play a role in equilibrium? Eyes/ proprioceptors PTC is another name for the chemical phenylthiocarbamide An individual with the genotype Tt for the PTC tasting gene would be a taster/ heterozygous for taste gene To what chemical stimulus do bitter taste receptors respond? Alkaloids PTC-like chemicals are found in brassica family of vegetables Name one vegetable in which PTC-chemicals are found. Cabbages Receptors like those of olfaction and taste that respond to chemicals in solution are called chemoreceptors Large round papillae are called circumvallate papillae Which cranial nerve sends afferent fibers that serve the anterior two-thirds of the tongue? Facial nerve (CN VII) Papillae found on the side of the tongue are called foliate papillae Mushroom-shaped papillae are called fungiform papillae...