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Title: Multiple Choice Bio Questions! Please help! Post by: princess001 on Feb 26, 2013 The structure that controls the amount of light entering the eye is
a) iris b) lens c) cornea d) pupil Two structures that respond to changes in light intensity are a) choroid and optic disc b) choroid and iris c) cornea and iris d) cornea and lens Some children like to twirl around in one place. after they stop twirling, they feel as though they are still moving. This feeling is caused by continued a) transmission of nerve impulses from cochlea to vestibular nerve b) movement of fluid against cochlea c) vibrations of tympanum d) movement of fluid in semicircular canals Focusing to adjust for changes in object distance is accomplished primarily by a) lens b) iris c) retina d) optic disc An area of the eye where sensory reception of light is most acute and an area where there is no such reception are a) retina and optic disc b) optic disc and cornea c) cornea and lens d) lens and retina What converts sound energy and light energy into nerve impulses? a) In the ear the tympanum and in the human eye the lens b) In the ear the cochlea and in the human eye the retina c) In the ear the auditory canal and in the human eye the cornea d) In the ear the vestibular nerve and in the human eye the central artery/ vein Sensory receptors for equilibrium and balance are found in the a) Eustachian tube b) Cochlea c) semicircular canals d) Auditory canal What acts to transfer sound vibrations mechanically from a fluid into nerve impulses? a) Cochlea b) Tympanum c) Semicircular canals d) Bone ossicles What converts sound waves to mechanical vibrations to amplify these vibrations? a) Tympanum and Bone ossicles b) Bone ossicles and vestibular nerve c) Cochlea and Semicircular canals d) Cochlea and Eustachian tube Motor neurons transmits impulses a) to the motor region of the brain b) to a sensory neuron c) to a muscle or a gland d) from a muscle or gland Title: Re: Multiple Choice Bio Questions! Please help! Post by: duddy on Feb 26, 2013 The structure that controls the amount of light entering the eye is a) iris b) lens c) cornea d) pupil (A) The iris controls the amount of light that enters the eye. Please limit topics to two questions a piece! Title: Re: Multiple Choice Bio Questions! Please help! Post by: duddy on Feb 26, 2013 Two structures that respond to changes in light intensity are a) choroid and optic disc b) choroid and iris c) cornea and iris d) cornea and lens (B) Title: Re: Multiple Choice Bio Questions! Please help! Post by: duddy on Feb 27, 2013 Topic continued here: https://biology-forums.com/index.php?topic=64779 :-\
Title: Re: Multiple Choice Bio Questions! Please help! Post by: princess001 on Feb 28, 2013 sorry i just needed help urgently
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