A student is feeling inside her backpack to find her mobile ...

[notis]

A student is feeling inside her backpack to find her mobile phone. There are a number of other items in the bag other than the phone.
 
  The nurse knows that which of the following terms best describes one's ability to sense of shape and size of an object in the absence of visualization?
  A)
  Stereognosis
  B)
  Astereognosis
  C)
  Modalities
  D)
  Somesthesia

Question 2

An adult male has a new diagnosis of Guillain-Barr syndrome. The nurse knows which of the following pathophysiological processes underlie the deficits that accompany the degeneration of myelin in his peripheral nervous system (PNS)?
 
  A)
  The destruction of myelin causes fewer Schwann cells to be produced in the client's PNS.
  B)
  The axonal transport system is compromised by the lack of myelin surrounding nerve cells.
  C)
  Unless remyelination occurs, the axon will eventually die.
  D)
  A deficit of myelin predisposes the client to infection by potential pathogens.

[1_Step_At_ATime]

Answer to Question 1

Ans:
A

Feedback:

The sense of shape and size of an object in the absence of visualization is known as stereognosis. Astereognosis is a deficit whereby a person can correctly describe the object but does not recognize it. Modalities is a term used for qualitative, subjective distinctions between sensations such as touch, heat, and pain. Somesthesia describes most of the perceptive aspects of body sensation and requires the function of the parietal association cortex.

Answer to Question 2

Ans:
C

Feedback:

In some pathologic conditions, the myelin may degenerate or be destroyed. This leaves a section of the axonal process without myelin while leaving the nearby oligodendroglial or Schwann cells intact. Unless remyelination takes place, the axon eventually dies. A lack of myelin is associated with reduced insulation and impulse conduction. Schwann cells produce myelin, not vice versa, and the myelin is responsible for neither the axonal transport system nor protection against pathogens.