What clear, curved window at the very front of the eye provides most of the bending of incoming light?

What colored muscular ring controls how much light enters the eye by changing the size of the central opening?

What opening lets light enter the interior of the eye after it passes the clear front surface?

What flexible transparent structure changes shape to focus images on the back sensory layer?

What light-sensitive neural layer lining the back of the eye contains photoreceptors?

What photoreceptor type works best in dim light and supports peripheral vision?

What photoreceptor type detects color and supports sharp detail in bright light?

What small depression at the center of the back sensory layer has the highest cone density and sharpest vision?

What cranial nerve carries visual sensory impulses from the eye toward the brain?

In the normal path of light, what structure is reached immediately after the opening in the colored ring?

What cerebral lobe receives visual input for conscious perception?

What visible outer ear flap funnels sound waves into the ear canal?

What thin boundary at the end of the ear canal vibrates when sound waves strike it?

What first small bone receives vibrations from the eardrum?

What middle ossicle passes vibration from the first ossicle to the last ossicle?

What final small bone pushes on the oval window to transfer vibration into the inner ear?

What spiral inner-ear chamber contains receptors that convert vibrations into nerve signals?

What receptor complex in the spiral chamber contains hair cells used for hearing?

What inner-ear structures detect turning movements of the head?

What inner-ear region contains receptors for head position and straight-line acceleration?

What canal connects the middle ear to the throat to equalize air pressure?

What cranial nerve carries hearing and balance signals from the inner ear to the brain?

What structures house receptor cells that detect dissolved chemicals in food?

What tiny bumps on the tongue increase surface area and often hold chemical-sensing structures?

What nasal sensory cells detect airborne chemicals after they dissolve in mucus?

What special sense sends signals to the cortex without first relaying in the thalamus?

What receptor type responds to tissue damage and produces pain signals?

What receptor type detects changes that make skin feel warm or cold?

What receptor type detects touch, pressure, stretch, or vibration in the skin?

What receptor type reports body position from muscles, tendons, and joints?

A constant odor becomes less noticeable after several minutes because receptor firing decreases. What is this response called?

A student sees nearby text clearly, but distant board writing is blurry because images focus in front of the light-sensitive layer. What disorder is this?

A student sees distant objects clearly, but nearby print is blurry because images focus behind the light-sensitive layer. What disorder is this?

Uneven curvature of clear focusing surfaces makes images distorted at many distances. What disorder is this?

Clouding of the flexible focusing structure blocks light and makes vision hazy. What disorder is this?

Fluid drains too slowly, pressure rises inside the eye, and fibers leaving the back of the eye are damaged over time. What disorder is this?

Vibrations fail to pass efficiently through the outer or middle ear, but inner-ear receptors may still work. What type of loss is this?

Hair cells or the nerve pathway from the inner ear are damaged, so sound reaches the inner ear but signals are not encoded normally. What type of loss is this?

A person hears ringing or buzzing even when no external sound is present. What disorder is this?

A person feels the room spinning even while standing still because equilibrium signals are disturbed. What disorder is this?