Author: Anonymous

49.  Liquid is prevented from leaking into the spaces between cells by _______. A. peripherally located vesicles                          B. several desmosomes                       C. multiple tight junctions                             D. several hemidesmosomes 

45.  A normal eukaryote cell has how many phospholipid membranes to protect its genetic material within the nucleus? A. 5                               B. 4                             C. 3                                D. 2

24.  A product reorganized and packaged in the Golgi is moved to where it is needed within the cell by ____________. A. micron motors                          B. intermediate filaments                   C. microtubules                       D. micro actins

31.  The first animal cells that were seen under a microscope were in  _______. A. a cork                      B. blood                          C. a sperm                     D. water

25.  Which eukaryotic structure has two phospholipid bilayer membranes?  A. nucleus                        B. Golgi                         C. ER                      D. cytoskeleton

47.  The structure which is continuous with the nuclear membrane is the _______.  A. DNA                            B. RER                            C. RNA                           D. DER  

20.  A cell membrane protein which binds to a hydrophilic compound to help it cross into the cell is known as a(n) ___________ protein. A. adhesion                       B. receptor                       C. recognition                       D. carrier

22.  A cell where the cytoplasmic fluid is hypertonic compared to the extracellular fluid would result in the cell _________.  A. sweling                           B. being unchanged                    C. shrinking                         D. collapsing  

38.  Which molecule is important for the flexibility of cell membranes? A. amino acids                           B. cholesterol                       C. triglycerides                       D. phosphates  

Provide two reasons why the United States continues to have one of the highest rates of adolescent pregnancy in the developed world.