Chapter 9

Pacinian corpuscles sense a. pressure. b. light touch. c. warmth. d. pain.

The spiral organ (of Corti) is important in sensing a. body movement. b. sound. c. light. d. degree of muscle contraction.

The greatest concentration of cones is found in the a. sclera. b. lens. c. ciliary body. d. fovea

Noah is a 4-year-old boy who has a middle ear infection. The cause of the infection could be a. bacteria that spread to the ear from a sore throat. b. excessive wax buildup in the ear canal. c. water that was trapped in the ear after bathing. d. noise pollution.

The blind spot of the eye is a. located in the cornea. b. the region where the optic nerve leaves the eye. c. the region of the eye where rods outnumber cones. d. the region where the ciliary muscle attaches.

The loudness or intensity of a sound wave is related to its a. amplitude. b. frequency. c. duration. d. pitch.

Sound waves are converted into mechanical movements by the a. bones of the middle ear. b. cochlea. c. oval window. d. round window.

Information about the position of arms, legs, and peripheral joints of the body in space comes from a. rods. b. cones. c. proprioceptors. d. semicircular canals.

The ________ determines the amount of light that enters the eye. a. retina b. cornea c. pupil d. fovea

A ___________ can detect changes in hydrogen ion concentration. a. thermoreceptor b. chemoreceptor c. proprioceptor d. pain receptor

Receptors in the vestibular apparatus respond to changes in a. head position. b. position of limbs. c. brightness of light. d. taste.