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The main muscle which causes the flexion of the temporomandibular joint in chewing is the _____________.

The term for neuron tracts crossing in the spinal cord is ____________.

The term for scarring of a tissue which has died or atrophied. is ______________ .

The descending somatic tract in the spinal cord which moves muscles to turn the head in response to sounds or sights beside the head is the ______________.

The quadriceps muscle group of the thigh is made up of all the following muscles EXCEPT which one?  

The CNS central nervous system receives information about changes in the external environment of the skin through __________. 

A physician consults you, a pharmacist, to assist him in the choice of an anti-convulsive drug to help reduce his patient’s epileptic seizures.  You know that the seizures are caused by uncontrolled contractions of the skeletal muscle fibers, created by over-reactive neurons involved in the neuromuscular junctions.  You and the physician seek a drug which will ____________.

The movement of which ion is responsible for repolarization of a neuron which has sent an action potential message down the axon? 

The movement of which ion is responsible for repolarization of a neuron which has sent an action potential message down the axon? 

Which neuroglial cells in the CNS central nervous system secrete CSF cerebrospinal fluid?