Exam 26: Sensing the Environment

In the human eye, the layer of light-sensitive cells used to capture images is called the

We can distinguish pitch because different regions of the basilar membrane vibrate in response to different sound __________.

In bright light, the openings in the pupils of our eyes become smaller.

The basilar membrane transmits action potentials to the middle ear, where they are converted to nerve impulses.

As you read this question, your eyes are moving to project the image of each word on your

In our eyes, the rods

The light-sensitive cells in our eyes are the rods and the _____.

Rods and cones pass their signals directly to the brain.

The center of the human retina has a region called the _____ where cones are most densely packed.

The cell indicated by the arrow in the figure below directly interacts with environmental stimuli.

The thin membrane called the _______ receives sound waves that have moved into the ear and converts pressure changes into physical movement.

The more concentrated an odor is, the more frequently it stimulates nerve impulses.

A ________ eye consists of many individual light-receiving units, each with its own lens and small cluster of photoreceptors.

In addition to the receptors in the mouth, chemical receptors in the _______ passages provide sensory information that contributes to a human's sense of taste.

Which of the following would not be found in the retina of a horse?

The sensory receptors that respond to extreme heat and cold and to injuries are ___________ receptors.

The sound intensity in the front rows of a rock concert is approximately 110 decibels. A pair of earplugs reduces sound intensity by about 30 decibels. A person wearing earplugs who is seated in the front rows of a rock concert for one hour has sufficiently protected his or her ears from hearing damage.

_______ are small clusters of sensory cells on the surface of the tongue that interact with the chemicals that pass through a human's mouth.

The function of otoliths in balance depends on

In the middle ear, the three tiniest bones in the body receive the vibrations from the eardrum and transmit them to a second membrane, which channels them to the