Exam 29: The Senses

Which statement regarding photoreceptors is true?

Mechanoreceptors are not evenly spaced on your body. What is an advantage of having mechanoreceptors located closer together?

Although the model for magnetic sensory perception is incomplete, we can hypothesize how the process of magnetic perception should work, based on other types of sensory perception. Which hypothesis for magnetic perception is consistent with how other types of sensory perception work?

One hypothesis explaining animals' abilities to detect a magnetic field and use it to navigate is that sensory cells detect electrical fluctuations influenced by Earth's magnetic field. Which evidence, if it were true, would support this hypothesis?

Information from the light receptors undergo its first level of neural processing in the

Which statement regarding compound eyes is true?

Bats and marine mammals are well-known examples of animals that produce high-frequency sound waves beyond the range of human hearing. The high-frequency waves are used for echolocation, the process of emitting high-frequency sound waves and using both the time it takes for the waves to bounce back to the caller and the direction from which the waves return to the caller to locate distant objects. Research has shown that bats can send and receive sounds as high as 100,000 Hertz (Hz). On the other hand, some mammals, such as elephants and whales, produce extremely low-frequency sounds. For example, elephant calls range from 5 to 50 Hz. Low-frequency sounds have long wavelengths, which means they are less likely to be distorted or interrupted by features in the environment. In favorable weather conditions, low-frequency sound waves can be transmitted over several kilometers. -What advantageous ability does the extended hearing range of elephants provide?

Fish that quickly and accurately sense the location of a nearby motionless fish in cloudy water are probably using

Which statement best describes the basis of sensory adaptation?

The eyes of a planarian provide

Myopia can be corrected with artificial lenses or surgery and is generally regarded as a benign disorder. However, as myopia is also associated with more severe conditions such as cataracts and glaucoma, a change in the prevalence of myopia (proportion of the population with myopia) may be a public health concern. The graph shows the change in the prevalence of myopia in three major ethnic groups in Singapore at three points in time. Source: Adapted from Morgan, I.G., Ohno-Matsui, K., and Saw, S. M. (2012). Myopia. Lancet, 379: 1739-1748. -What anatomical changes do you expect to accompany the change in prevalence of myopia?

The cochlea is

What structure is involved in the human sense of balance?

You exercised to the point that you were breathing heavily. Your heavy breathing was the result of ________ relaying information about the amount of O2 in your blood to the medulla, which ultimately resulted in your increased rate of breathing.

A common aspect of having a cold is nose congestion ("stuffy nose"). Air is not able to flow past your olfactory receptors, so you cannot detect smells. When eating, it is olfactory receptors, and not taste receptors, that detect the smells of your food and relate those to your brain as flavors. -Suppose you are trying to convince your sick child to drink some medicine that he knows does not taste good. You tell him to hold his nose while he drinks it because that will help take the bad taste away. Does your statement have any truth to it?

Which list correctly orders the structures within the ear as they transfer a sound wave during hearing?

The semicircular canals

Which option incorrectly pairs a class of sensory receptor with one of the stimuli it detects?

Which part of this figure is the retina?

Honeybees are able to discriminate between different flowers using