Exam 14: Touch and Pain

Endorphins act through the process of ______.

Which of the following statements about pruriceptors is true?

The body produces endogenous opioids ______.

The dorsal horn is an area ______.

Muscle spindles are receptors in the tendons that measure the force of a muscle's contraction.

SAI mechanoreceptors are slow-adapting receptors using Merkel cells, with small receptive fields, densely packed near the surface of skin.

Reed et al.(1996) studied a patient with tactile agnosia, who had tactile agnosia only in her right hand because of a left hemisphere lesion caused by a stroke in that area.They found that ______.

Endogenous opioids work by acting as ______.

Passive electroreception is the ability to generate electric fields and then detect disturbances or changes to those electric field caused by external events.

There is a class of receptors called thermoreceptors that signal very strongly at both very high temperatures and at very cold temperatures.

Roger is given an unusual object.He picks it up and does a variety of manipulations with it.He moves his hand along the surface to assess texture, he supports it to assess its weight, and he presses on it to assess its hardness.Roger has been engaging in ______.

Pruriceptors in the skin respond mainly to ______.

The sensation of rocking that a person often experiences after returning from a cruise is created by ______.

Leon is bitten by an insect and starts to scratch his arm.Linda tells him not to because she claims it will make the bite itch more and be less likely to heal.Briefly explain what will really happen if Leon scratches the bite and who is correct.

Amy falls into a river and breaks her leg.Despite intense pain, she swims out of the river and walks to safety because she knows if she doesn't get inside before dark, she is likely to freeze to death.Briefly explain what is going on in Amy's body that enables her to reach safety despite experiencing severe pain.

A feature whereby the skin of the body plots onto the surface of the primary somatosensory cortex in a systematic way is known as ______.

An area in the thalamus that receives input from both the dorsal column-medial lemniscal pathway and the spinothalamic pathway is known as the ______.

The ability to detect electric fields, seen in many species of fish, is known as ______.

Emmi has not been feeling well.Suddenly, she is unable to stand or keep her balance, and she can barely hear.Fearing something terrible, she goes to the doctor, who tells her she simply has a cold that is affecting her vestibular system.Briefly describe how Emmi's vestibular system is connected to a cold.

Select all that apply.Which of the following are hypotheses used to explain the relation of itching to scratching?