A&P3

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Author:
TheseFights
ID:
222206
Filename:
A&P3
Updated:
2013-06-03 13:10:08
Tags:
anatomy physiology
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Description:
ch. 3
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  1. The smallest living unit within the human body is
    the cell.
  2. Which of the following is not a function of membrane proteins?
    storage of cellular nutrients
  3. The organelles and the watery component of the cell together is called
    cytoplasm.
  4. Many proteins in the cytosol are ________ that accelerate metabolic reactions.
    enzymes
  5. Which of the following cytoskeleton components moves the chromosomes during cell division?
    microtubules
  6. In the mitochondrion, folds are to cristae as the contained fluid is to
    matrix.
  7. Renewal or modification of the cell membrane is a function of the
    Golgi apparatus.
  8. Some cells contain large numbers of mitochondria while others have relatively few or none. This suggests that
    cells with large numbers of mitochondria have a high energy demand.
  9. The components of ribosomes are formed within
    nucleoli.
  10. The control center for cellular operations is the
    nucleus.
  11. The functional units of DNA that contain the instructions for making one or more proteins are
    genes.
  12. mRNA is needed to synthesize ________ in the cytoplasm.
    proteins
  13. The DNA molecule is like a twisted ladder. What molecules form the "sides" of the DNA ladder?
    alternating molecules of sugar and phosphate groups
  14. Water molecules and small ions enter a cell through
    channels formed by integral proteins.
  15. "Spikes" form on a blood cell when it is placed in a(n) ________ solution.
    hypertonic
  16. If the concentration of sodium chloride in the interstitial fluid surrounding cells decreases and the concentration of other solutes remains constant,
    the cells will swell.
  17. The intake of small membrane vesicles from the extracellular fluid is called
    endocytosis.
  18. A defense cell engulfing a bacterium illustrates
    phagocytosis
  19. The potential difference across the cell membrane is due to the separation of
    cations and anions.
  20. What does DNA polymerase do?
    Enzyme that builds new strands of DNA
  21. During which phase of the cell cycle does DNA duplication, or replication, take place?
    Interphase
  22. When a double helix of DNA is replicated, two complete helices are formed. Together, these helices are called sister __________.
    chromatids
  23. During which phase of mitosis do sister chromatids line up at the center of the cell?
    Metaphase
  24. During which phase of mitosis do the sister chromatids move apart?
    Anaphase
  25. During which phase of mitosis do nuclear envelopes and the nucleoli reappear?
    Telophase
  26. During which phase of mitosis do the nuclear envelope and nucleoli disappear?
    Prophase
  27. What is the name of the process by which the cytoplasm divides in two?
    Cytokinesis
  28. The stage in a cell's life cycle in which the cell performs its normal functions and prepares for division is called
    interphase
  29. During mitosis, chromatids separate into daughter chromosomes during
    anaphase
  30. Before a cell divides, its DNA must be replicated to
    supply each new cell with a full set of the genetic material
  31. If a cell has 18 chromosomes and undergoes mitosis how many chromosomes would each daughter cell have?
    18
  32. The genetically programmed death of cells is called
    apoptosis
  33. An alternate term for tumor is
    neoplasm
  34. As genes are functionally eliminated, the cell becomes limited in the range of proteins it can make. This specialization process is termed
    differentiation

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