Physiology Quiz 7 05/04/2016 Place the following steps in the correct order for transduction of a chemical odorant into a nerve signal. [AdsenseImage] 1. Odorants reach receptors in the cilia of olfactory neurons. 2. cAMP opens ions channels that allow sodium and calcium ions to enter the cell. 3. The G-protein activates an enzyme, adenylate cyclase, to convert ATP into cyclic AMP (cAMP). 4. The binding of an odorant activates a G-protein which then detaches from the receptor. 5. The membrane is depolarized. Depolarization that reaches threshold at the axon hillock triggers an action potential and transduction has been achieved. 1, 2, 3, 4, 5 1, 3, 4, 2, 5 1, 4, 3, 2, 5 1, 4, 2, 3, 5 Place the following steps of nerve impulses in the olfaction pathway in order. 1. primary olfactory cortex in the temporal lobe 2. olfactory nerve 3. olfactory neurons 4. olfactory bulb 3, 4, 2, 1 2, 4, 3, 1 3, 2, 4, 1 2, 3, 4, 1 Taste is detected when chemicals bind receptors on the microvilli of: basal cells. olfactory cells. gustatory cells. supporting cells. What taste sensation results when sodium ions enter gustatory cells through sodium ion channel receptors, and the cell depolarizes? salty umami sour bitter [AdsenseImage] Which of the following parts of the eye refract light to focus it on the retina? sclera and choroid ciliary body and suspensory ligaments pupil and iris cornea and lens [AdsenseImage] The ability of the lens to change its shape from flattened to round is known as: inversion. accommodation. refraction. convergence. Twenty-year-old Leslie learned she is hyperopic after having her eyes examined. What best describes her eye condition? Her eyeballs are too long. Her eyeball shape is normal. Her eyes are experiencing age-related decline. Her eyeballs are too short. Determine the correct order that light, and then an action potential, travels as it strikes the retina. bipolar cells, photoreceptor cells, retinal ganglion cells, optic nerve photoreceptor cells, retinal ganglion cells, bipolar cells, optic nerve retinal ganglion cells, photoreceptor cells, bipolar cells, optic nerve photoreceptor cells, bipolar cells, retinal ganglion cells, optic nerve Having to adjust to a dark room after walking in from bright light is because: only cones function in dim light. the lens requires time to accommodate dim light. rhodopsin does not function in dim light. rods exposed to bright light need time to regenerate rhodopsin. [AdsenseImage] As sound waves travel into the ear, they pass from the auditory canal to the: tympanic membrane, auditory ossicles, oval window, endolymph, scala vestibuli of the cochlea. tympanic membrane, auditory ossicles, round window, perilymph, scala vestibuli of the cochlea. tympanic membrane, oval window, auditory ossicles, perilymph, scala vestibuli of the cochlea. tympanic membrane, auditory ossicles, oval window, perilymph, scala vestibuli of the cochlea. Where are sound vibrations amplified? auditory ossicles semicircular canals vestibule tympanic membrane The loudness of sound is determined by the vibrations of the: basilar membrane. otoliths. scala vestibuli. tectorial membrane. Damage to the hair cells of the spiral organ (organ of Corti) can result in a loss of: equilibrium. olfaction. hearing. vision. The startle reflex occurs when auditory information reaches the: thalamus. pons. hypothalamus. midbrain. The sense of equilibrium does NOT depend on input from: proprioceptors in muscles and joints. the cochlea. the visual system. the vestibular system. Which of the following demonstrates static equilibrium? sitting in a movie theater to watch a film spinning on a merry-go-round at the park riding in an elevator riding in a car [AdsenseImage] What detects dynamic equilibrium? crista ampullaris cochlea utricle and saccule spiral organ (organ of Corti) Neural sensory signals are relayed to the thalamus, EXCEPT for the sensation of: olfaction. vision. hearing. dynamic equilibrium. Where are sensations integrated with memories of past experiences? frontal lobe cerebellum limbic system parietal lobe [AdsenseImage] FacebookNight Before Christmas Funny Trump & Obama Poem! As an Amazon Associate we earn from qualifying purchases through some links in our articles.
