1-50. The pulse pressure is the difference between 1. venous and arterial pressure 2. resting and active pulse rate 3. atrial and ventricular pressure 4. systole  and  diastole 1-51. The venous system that carries digested materials from the intestinal tract is the 1. portal 2. pulmonary 3. abdominal 4. pelvis 1-52.  Lymph  nodes  participate  in  all of the following EXCEPT 1. manufacturing of white blood cells 2. filtration of bacterial debris 3. production of hormones 4. collection of large protein molecules 1-53. Windpipe is another term for 1. nares 2. larynx 3. trachea 4. p h a r y n x 1-54.  The  primary  muscle  of respiration  is  the 1. pleura 2. alveolus 3. diaphragm 4. mediastinum 1-55.    Cessation of breathing is 1. apnea 2. bradypnea 3. hypopnea 4. dyepnea 1-56. A nerve cell, or neuron, is composed of all of the following EXCEPT a/an 1. synapse 2. axon 3. cyton 4. dendrite 1-58. The space through which a nerve impulse passes from one neuron to another is called a/an 1. myelin  sheath 2. synapse 3. axon 4. ganglion 1-59. Balance, coordination of movement,  and  harmony  of  motion are functions of the 1.    cerebral   cortex 2.   cerebellum 3.    pons 4.    temporal  lobe 1-60.  The  medulla  oblongata  is  the principle site of control for 1. circulation  and  respiration 2. memory 3. sight  and  hearing 4. formation of cerebral spinal fluid 1-61.   The meninges, membrane layers covering the brain and spinal cord,   are composed of all of the following  EXCEPT  the 1. dura  mater 2. pia mater 3. archnoid 4. foremen magnum 1-62.  Cerabral  spinal  fluid  is produced in the 1. ventricles of the brain 2. spinal  cord 3. meninges 4. medulla   oblongata 1-63. The 12 pairs of cranial and 31 pairs of spinal nerves form the 1. peripheral nervous system 2. central nervous system 3. solar  plexus 4. brachial  plexus 1-57. The impulse receptors of a nerve are the 1. dendrites 2. Schwann  cells 3. ganglia 4. terminal   filaments 5