quiz 13

Which of the following is not a cranial nerve?

• optic

• abducens

• vagus

• brachial

A patient has an injury of the spine and is now suffering from a loss of motor function in his right arm. However, he still has normal sensory function in the arm. Based on this information it is likely that the patient has nervous tissue damage located at ________.

•  

  the dorsal root located at one or more of the cervical vertebra

  
  

•  

  the ventral root located at one or more of the cervical vertebra

  
  

•  

  spinal nerves of the cervical vertebra

  
  

•  

  the dorsal rootlets located at one of the thoracic vertebra

  
  

The process by which a stimulus is transformed into an electrical response is referred to as:

• Perception

• Sensory Homunculus

  
  

• Central Adaptation

  
  

• Transduction

  
  

After axonal injury, regeneration in peripheral nerves is guided by ________.

•  

  Golgi organs

  
  

• dendrites

•  

  Schwann cells

  
  

•  

  Wallerian cells

  
  

Which of the following best describes the crossed-extension reflex?

• A reflexive response that involves the coordinated flexing of one limb and extension of the opposite limb

  
  

• A protective reflex that inhibits a motor response

  
  

• A sudden reflex to stretch the muscles

  
  

• A rapid contraction in response to a sharp pain

  
  

A reflex that causes muscle relaxation and lengthening in response to muscle tension is called a ________.

•  

  crossed-extensor reflex

  
  

•  

  flexor reflex

  
  

•  

  plantar reflex

  
  

•  

  tendon reflex

  
  

The odd tingling sensation that you experiences when you hit the funny bone is due to trauma to the ________ nerve.

•  

  axillary

  
  

•  

  radial

  
  

•  

  median

  
  

•  

  ulnar

  
  

How is a monosynaptic reflex arc distinguished from a polysynaptic reflex arc?

• A monosynaptic reflex arc involves multiple synapses between neurons, while a polysynaptic reflex arc involves only one.

  
  

• A monosynaptic reflex arc involves only one synapse between neurons, while a polysynaptic reflex arc involves multiple.

  
  

• Monosynaptic reflex arcs and polysynaptic reflex arcs are identical and cannot be distinguished.

  
  

• Monosynaptic reflex arcs occur only in the CNS, while polysynaptic reflex arcs occur only in the PNS.

  
  

The second cranial nerve forms a chiasma at the base of the brain for partial crossover of neural fibers.

•  

  True

  
  

•  

  False

  
  

 

Regeneration within the CNS ________.

•  

  is more successful than with the PNS

  
  

•  

  is prevented due to growth-inhibiting proteins of oligodendrocytes

  
  

•  

  typically allows axonal sprouting of 20 mm

  
  

•  

  is promoted by growth inhibitors and glial scars