Exam 44: Sensory Systems

Nociceptors can respond to nearby tissue damage by sensing cytosolic factors released by damaged cells.Such "algogenic agents" can cause pain sensation even in the absence of tissue damage.What might be a practical use for such an agent?

Which is NOT a part of the vertebrate eye?

You make a knockout of a gene involved in neurological development, and find that the mice have malformed semicircular canals.Instead of being orthogonal (at right angles) to each other, they are parallel.What aberrant behavior might you see in these mice?

What is the molecular basis of touch sensation?

Cutaneous receptors are classified as interoceptors.These specialized skin receptors can respond to which of the following stimuli?

What sensory equipment is required for an animal to have binocular vision?

What difference in axonal signaling determines whether we experience a mild or a strong sensation?

If the cilia on Bob's inner ear hair cells are damaged, what can be done to improve Bob's hearing, other than a hearing aid?

What effect do high frequency sounds tend to have on the ear?

True or False: There is only a single type of pain receptor.Activation of multiple types of receptors can be interpreted as "pain" especially with unusually high degrees of activation.

Which of the following is NOT an example of a mechanoreceptor?

In 1908, chemist Kikunae Ikeda identified a new taste modality he called "umami", or "delicious" in Japanese.It gives a savory flavor to meat, seaweed, and tomatoes.What molecule is responsible for umami?

All sensory input arrives at the central nervous system in the same form, as ____________ propagated by afferent neurons.Perception of the type and intensity of a stimulus depends on which part of the brain the impulse projects to and the firing frequency of the sensory neuron.

If genetically engineered bees could express a receptor for TNT in their olfactory neurons, how could the transgenic bees be useful for detecting explosives?

One patient at your audiology clinic has an actin defect, and another patient has a microtubule defect.What sense other than hearing may be affected in these patients?

Which animal is NOT able to use sonar as a form of "lightless vision" to navigate in dark environments?

What happens to a retinal photopigment when it captures a photon?

Why are carrots said to be good for you?

In the vertebrate eye, what structure is light focused onto?

What information would best help you distinguish what type of sensation a sensory neuron transmits?