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24 Cards in this Set
- Front
- Back
___________ are rod-shaped bodies with interior folds, called cristae. |
Mitochondria |
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When a cell is placed in a hypertonic or hypotonic solution the volume change is generally due to the ____________. |
net movement of water into or out of the cell |
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Microscopically, chromosomes appear as _____________. |
rodlike bodies inside the cell |
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A dialysis sac is permeable to water, but relatively impermeable to glucose. A dialysis sac filled with 40% glucose that is placed into a beaker containing distilled water, should see a ____________. |
net movement of water into the sac |
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Filtration rate is directly dependent on _________. |
a pressure gradient |
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A living cell placed in a hypertonic solution would ____________. |
shrink |
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Which transport mechanism occurs as dye molecules placed at the center of an agar matrix spread out? |
diffusion |
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Which transport mechanism will be observed if dye crystals are added to the bottom of a cylinder of water? |
diffusion |
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When looking at different cell types, it is evident that cell shape is associated with ____________. |
cell function |
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The plasma membrane controls the movement of substances into and out of the cell. The plasma membrane is able to do this because it is ____________________. |
selectively permeable |
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Several different kinds of internal structures do the work of the cell. These are referred to as __________. |
organelles |
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A dialysis sac containing 40% glucose is placed into a 40% glucose solution. The sac does not change weight, suggesting that ________. |
no net osmosis occurred |
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The difference between active transport and passive transport is that __________. |
active transport uses cellular energy to drive the transport |
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The polar heads of phospholipid molecules in a bilayer are located ___________. |
both outside the cell and inside the cell facing both the extracellular fluid and the cytoplasm |
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A dialysis sac is comparable to a plasma membrane because it is _____________. |
selectively permeable |
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The three structures that most animal cells have and that can be readily seen under a compound microscope are _____________. |
nucleus |
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The phase when a cell is growing, carrying out its usual activities, and preparing to divide is called __________. |
interphase |
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The mitotic stage in which the chromosomes align at the middle of the cell is called ___________. |
metaphase |
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The net movement of dye molecules diffusing through water is from a ____________ to a ___________ concentration. |
high to low |
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In osmosis, ________ moves through a differentially permeable membrane. |
water |
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The function of ribosomes is __________. |
the site of protein synthesis |
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In general, diffusion occurs when there is a(n) ____________. |
concentration gradient |
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Which type of vesicular transport involves fluid and dissolved solutes entering the cell in a tiny vesicle? |
pinocytosis |
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Identify the stage of mitosis when chromosomes first appear and the nuclear envelope and nucleolus begin to break down. |
prophase |