WileyPlus Ch 17 – Flashcards

Which of the following describes the correct sequence of events of an olfactory receptor reacting to an odorant? opening of sodium ion channels - production of cAMP - generation of nerve impulse - depolarization production of cAMP - generation of nerve impulse - opening of sodium ion channels - depolarization production of cAMP - opening of sodium ion channels - depolarization - generation of nerve impulse generation of nerve impulse - production of cAMP - opening of sodium ion channels - depolarization

Which of the following does not pertain to the lacrimal apparatus? -tears are produced by the sebaceous glands -tears contain a bactericidal enzyme -tears exit the eye vicinity via two small lacrimal puncta -lacrimal fluid ultimately ends up in the nasal cavity -lacrimal ducts empty tears onto the conjunctiva of the upper lid

The cis to trans conversion of retinal when photopigments respond to light is called: bleaching regeneration isomerization adaptation

Which of the following does not describe the visual pathway as light enters the eye? -visual information from the right half of the visual field goes to the left side of the brain -all axons from the temporal half of the retina cross in the optic chiasm -all axons of the retina exit the eye at the optic disc -optic radiations connect the thalamus to the primary visual area in the cortex

Which is the correct order of events of sound transmission through the ear? 1. sound waves strike the eardrum 2. the ear ossicles vibrate 3. hair cells of the organ of Corti vibrate 4. the perilymph in the cochlea moves 5. sound waves enter the external auditory canal 5, 4, 3, 2, 1 1, 2, 3, 4, 5 5, 1, 2, 4, 3 5, 2, 1, 3, 4

Which structure transduces mechanical vibrations into electrical signals? hair cells supporting cells tympanic membrane oval window auricle

Which structure within the ampulla contains hair cells that are involved in dynamic equilibrium? cupola macula otolithic membrane crista vestibular apparatus

Which of the following form an inverted v-shaped row at the back of the tongue? ampulla vallate papillae cupulae semicircular canals vestibular folds

Cones outnumber rods. function only at low light levels. allow color vision are concentrated at the periphery of the retina. are most critical for night vision.

Which of the following is a TRUE statement? -Cone pigments regenerate much more slowly than rod pigments. -Rhodopsin absorbs blue and green light, retinal absorbs orange and red light, and opsin absorbs yellow light. -Rods are involved in color vision. -Rods contain three different kinds of photopigments, each of which absorbs light at different wavelengths. -The retina contains three different types of cones, each with a different kind of photopigment.