cell biology.txt

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Anonymous
ID:
101293
Filename:
cell biology.txt
Updated:
2011-09-12 18:25:08
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cell biology
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Description:
cell biology
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  1. membrane phospolipid arrage themeselves w/ the hydrophillic ends towards the -- of the membrane and the hydrophobic ends towards the --- of the membrane

    A. internal face/external face
    B. surface/center
    C. center/surface
    D. external face/internal face
    B. surface/center
    (this multiple choice question has been scrambled)
  2. A protein that adheres to the intracellular face of the plasma membrane is called an

    A) peripheral protein.
    B) integral protein.
    C) transmembrane protein.
    D) None of the above.
    a. preipheral protein
  3. Membrane proteins that aid in
    communications from other cells are

    A. glycocalyx.
    B. receptors.
    C. motor molecules.
    D. clonal proteins
    E. carriers
    B. receptors
    (this multiple choice question has been scrambled)
  4. ----increase a cell's external surface area and are found on intestinal cells.

    A. Ribosomes
    B. Microvilli
    C. Flagellae
    D. Glycocalyx
    E. Cilia
    B. microvilli
    (this multiple choice question has been scrambled)
  5. When blood pressure in capillaries forces water and dissolved solutes out into the tissue fluid, this is called
    A. filitration
    B. diffusion
    C. osmotic pressure
    D. osmosis
    A. filitration
    (this multiple choice question has been scrambled)
  6. The hydrostatic pressure required to stop osmosis is known as
    A. diffusion pressure
    B. transport pressure
    C. osmotic pressure
    D. filitration pressure
    C. osmotic pressure
    (this multiple choice question has been scrambled)
  7. Blood cells in a hypotonic solution will
    A. shrink (crenation).
    B. plasmolyze.
    C. stay the same
    D. burst (hemolysis).
    D. burst(hemolysis)
    (this multiple choice question has been scrambled)
  8. The Na+ K+ pump is associated with
    a. active transport
    b. resting membrane potential
    c. antiporters and symporters
    d. all of the above
    d. all of the above
  9. Where the extracellular fluid is more highly concentrated than the intracellular fluid, we may say it is
    A. actively transported
    B. osmotic
    C. hypotonic
    D. hypertonic
    E. isotonic
    D. hypertonic
    (this multiple choice question has been scrambled)
  10. By what method can the intestinal cells absorb sodium ions if they are in higher concentration inside the cell?
    a. active transport
    b. osmosis
    c. diffusion
    c. facilitated diffusion
    d. filtration
    active transport
  11. Which of the following organelles can be compared to a power-house because it supplies the cell with energy?
    A. chloroplast
    B. nucleus
    C. golgi complex
    D. mitochondria
    D. mitochondria
    (this multiple choice question has been scrambled)
  12. The nucleus of the cell
    a. is the site of RNA synthesis.
    b. is the largest organelle in eukaryotes.
    c. has a double membrane.
    d. all of the above
    d. all of the above
  13. Endoplasmic reticulum can be smooth or rough. The rough endoplasmic reticulum is different from the smooth because it has _____ embedded in it.
    A) ribosomes
    B) lysosomes
    C) peroxisomes
    D) chromatin
    a. ribosomes
  14. Which structure increases cell surface area?
    A) microtubules
    B) microfilaments
    C) microvilli
    D) inclusions
    c. microvilli
  15. The glycolipids and glycoproteins function to
    A) increase cell surface area.
    B) provide structural support to the cell.
    C) confer each cell's unique identity or fingerprint.
    D) increase membrane fluidity.
    c. confer each cell's unique identity or fingerprint
  16. Which of the following structures is most closely related to moving particulate matter along the surface of epithelium?
    A) flagella
    B) cilia
    C) microvilli
    D) brush border
    b. cilia
  17. Which tonicity describes a solution that has a lower concentration of nonpermeating solutes than the intracellular fluid?



    A)
    hypertonic



    B)
    hypotonic



    C)
    isotonic



    D)
    heterotonic
    hypotonic

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