魅影直播

In a short essay (100鈥�150 words), describe three ways in which the structure of the lens of the human eye is well adapted to its function in vision.

Which one of the five categories of sensory receptors is primarily dedicated to external stimuli?

Bloodhounds, which are adept at following a scent trail even days old, have no more olfactory receptor genes than other dogs. Predict how the sensory and nervous systems of bloodhounds differ from those of other dogs in ways that contribute to their tracking ability.

Why can eating 鈥渉ot鈥� peppers cause a person to sweat?

If you stimulate a sensory neuron electrically, how would that stimulation be perceived?

Which of the following sensory receptors isincorrectlypaired with its category?

(A) hair cell鈥攎echanoreceptor

(B) snake pit organ鈥攖hermoreceptor

(C) taste receptor鈥攃hemoreceptor

(D) olfactory receptor鈥攅lectromagnetic receptor

How are otoliths adaptive for burrowing mammals, such as the star-nosed mole?

Suppose a series of pressure waves in your cochlea caused a vibration of the basilar membrane that moves gradually from the apex toward the base. How would your brain interpret this stimulus?

If the stapes became fused to the other middle ear bones or to the oval window, how would this condition affect hearing? Explain.

Plants use statoliths to detect gravity (see Figure 39.22). How do plants and animals differ with regard to the type of compartment in which statoliths are found and the physiological mechanism for detecting their response to gravity?