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Biology 1161 Chapter 3 and 24 Study Guide(102 questions and answers).
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Biology 1161 Chapter 3 and 24 Study Guide(102 questions and answers).
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Biology 1161Chapter 3 and 24
Study Guide(102
questions and
answers)
What is a cell? - answer Basic unit of life
What is the cell theory? - answer All living things are
composed of cells
Major parts of a generalized cell - answer plasma
membrane, nucleus, cytoplasm
What are extracellular materials? - answer substances
contributing to body mass that are found outside the cells
What kind of extracellular materials exist in the human
body? - answer Glycosaminoglycans and their
, proteoglycansthat resist compressive forces. Adhesive
glycoproteins (laminin, fibronectin, tenascin, nidogen)
Why is the plasma membrane considered to be selectively
permeable? - answer because substances do not cross it
indiscriminately
Describe the type of lipids found in the plasma membrane
- answer amphipathic, hydrophilic, and phospholipids
What are integral proteins? - answer Proteins that
penetrate the hydrophobic core.
What are peripheral proteins? - answer proteins that
bound to the surface of the membrane
six functions of proteins in the plasma membrane - answer
transport, enzymatic activity, signal transduction, cell-cell
recognition, cell-cell attachments, attachment to
cytoskeleton/extracellular matrix
Three types of membrane junctions - answer tight
junctions, desmosomes, gap junctions
Difference between active and passive processes - answer
Active requires energy (osmosis), passive doesn't
(diffusion)
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