2p95exam practice

1 Question 1:A group of neuron cell bodies in the central nervous system, which share a common function, is known as a _______________.  column  ganglion  soma  neural cortex  tract  center Question2 Question 2:Sensory neurons of the peripheral nervous system are usually _______________.  bipolar  pseudounipolar  anaxonic  multipolar  multipolar AND anaxonic  multipolar AND pseudounipolar Question3 Question 3:Which of the following is/are NOT (a) function(s) of ependymal cells?  They assist in producing, circulating, and monitoring cerebrospinal fluid.  They line the ventricles in the brain and the central canal in the spinal cord.  They regulate ion, nutrient, and dissolved-gas concentrations.  They remove cell debris, wastes, and pathogens by phagocytosis.  They remove cell debris, wastes, and pathogens by phagocytosis AND they regulate ion, nutrient, and dissolved-gas concentrations. Question4 Question 4:Which of the following receptors monitor the position and movement of skeletal muscles and joints?  visceral motor neurons  interneurons  exteroceptors  proprioceptor  neuroeffectors  interoceptors Question5 Question 5:Which of the following is NOT a type of neuroglia found in the central nervous system (CNS)?  satellite cells  astrocytes  microglia  oligodendrocytes  ependymal cells Question6

Question 6:Nerve impulses would travel most quickly through axons of which of the following characteristics?  0.5 µm diameter, myelinated  1 µm diameter, myelinated  20 µm diameter, unmyelinated  20 µm diameter, myelinated  0.5 µm diameter, unmyelinated  15 µm diameter, unmyelinated Question7 Question 7:Which of the following structures is/are usually lost by neurons during differentiation?  Nissl bodies  centrioles  perikaryon  neurofilaments  chromatophilic substance  neurofibrils Question8 Question 8:Which of the following neural circuits is characterized by a system in which information is relayed in a stepwise sequence, from one neuron to another, or from one neural pool to the next, and in a sequential manner?  divergence  convergence  serial processing  reverberation  Wallerian processing  parallel processing Question9 Question 9:Which of the following most accurately describes the neuroglia of the central nervous system (CNS)?  The processes of oligodendrocytes are slender and more numerous compared to those of astrocytes, and they tie clusters of axons together and improve the functional performance of neurons.  The astrocytes are packed with neurofibrils that extend across the breadth of the cell, forming a structural network that supports the neurons of the brain and spinal cord.  Cytoplasmic processes of astrocytes facilitate the exchange of proteins with the extracellular fluid within the CNS.  Ependymal cells are cuboidal to columnar in form, have slender processes that branch extensively, and make direct contact with glial cells.  The microglia appear early in embryonic development through the division of endodermal stem cells. Question10 Question 10:Which of the following statements regarding peripheral nerve regeneration after injury is FALSE?  Fragmentation of the axon and myelin occurs in the proximal stump.

Question 5:Which structure(s) is/are (an) extension(s) of the spinal pia mater that originate(s) along either side of the spinal cord, between the ventral and dorsal roots?  conus medullaris  filum terminale  perineurium  denticulate ligaments  epineurium  coccygeal ligament Question6 Question 6:Which of the following statements regarding the dura mater of the spinal cord is/areFALSE?  It forms the outermost covering of the spinal cord.  It consists of a layer of dense irregular connective tissue whose outer and inner surfaces are covered by a simple squamous epithelium.  The outer epithelium is bound to the bony walls of the vertebral canal.  The epidural space contains blood vessels and dense connective tissue, as well as adipose tissue.  The outer epithelium is bound to the bony walls of the vertebral canal; AND the epidural space contains blood vessels and dense connective tissue, as well as adipose tissue.  None of the statements is false. Question7 Question 7:Which of the following is/are considered somatic reflexes?  superficial and stretch reflexes  control of smooth and cardiac muscle action  control of glands  control of skeletal muscle contractions  control of smooth cardiac muscle actions AND control of glands  superficial and stretch reflexes; AND control of skeletal muscle contractions Question8 Question 8:Regarding organization of the spinal cord, what is found on either side between the anterior and posterior funiculi?  posterior gray horns  lateral white columns  posterior white columns  lateral gray horns  gray commissure  anterior white columns Question9 Question 9:Reflexes can be classified according to _______________.  their development  the nature of the resulting motor response  the site where information processing occurs  the complexity of the neural circuit involved  their development, the nature of the resulting motor response, and the complexity of the neural circuit involved  All of the listed responses are correct.

Question10 Question 10:Regarding sensory fibers in spinal nerves, information flows into the ventral ramus from _______________.  exteroceptors and proprioceptors of the back  exteroceptors and proprioceptors of the body wall and the limbs  interoceptors of the visceral organs  interoceptors of the body wall and the limbs  interoceptors, exteroceptors, and proprioceptors of the body wall and the limbs  All of the listed responses are correct. Question 1 Which of the following statements about the tail of the epididymis is FALSE? It reverses direction.  A decreased number of convolutions marks its starting segment.  It is the principal region involved with sperm storage.  It exhibits epithelial changes as it ascends.  It has stereocilia. Question2 Question 2:The blood–testis barrier is composed of _______________ between extensions of _______________, which function to isolate the luminal portion of the seminiferous tubule from the surrounding interstitial fluid.  desmosomes; interstitial cells  tight junctions; interstitial cells  gap junctions; Sertoli cells  tight junctions; Sertoli cells  gap junctions; interstitial cells  desmosomes; Sertoli cells Question3 Question 3:As ovulation approaches, the follicular cells surrounding the oocyte are known as _______________.  the corona radiata  the zona pellucida  thecal cells  the corpus luteum  granulosa cells  the antrum Question4 Question 4:Which of the following is a dense fibrous layer rich in collagen fibers that surrounds the testis?  cremaster  dartos  perineal raphe  tunica albuginea

 It varies in length and width.  It is innervated by the hypogastric plexus, sacral nerves S1–S4, and branches of the pudendal nerve.  It serves as a passageway for the elimination of menstrual fluids.  It lies parallel to the rectum.