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29 Cards in this Set
- Front
- Back
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Cyte means?
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cell
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What is Cytology?
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The scientific study of cells.
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Inter-? means
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between
Ex) intercyte= between cells |
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Intra-? means
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Within -Intracyte (inside the cell)
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Endo-? means
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with in---the Inner
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Extra-?
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outside
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The _______ is the SMALLEST living structural function and living unit.
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cell
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__________ ___________ depend of individual and collective cell functions?
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Organismal functions:
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The size of cells is a function of _______________ to __________ ratio?
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The size of cells is a function of SURFACE AREA to VOLUME ratio.
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Each cell must maintain its own Homeostasis?
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TRUE
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Each cell must be able to _______ and _______with other body cells?
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Communicate and coordinate.
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Examples of cells that connect body parts, form linings or transport gasses?
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Fibroblast, Erythrocytes, Epithelial cells
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what do Macrophage cells do?
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Macrophage cells fight disease.
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What are the 3 basic parts of a human cell?
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-Plasma membrane — flexible outer boundary
Cytoplasm -intracellular fluid containing organelles, nutrients -Nucleus — control center |
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The Plasma membrane.
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The plasma membrane is the unit membrane at the cell surface, it determines the boundaries of the cell, governs its interactions with other cells and controls the passage of materials into and out of the cell.
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The side that faces the cytoplasm is the __________ ________ of the membrane and the side that faces outward is the ____________ _________
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cytoplasm intracellular face;
side faces outward is: extracellular face |
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In the Plasma membrane:
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-Bimolecular layer of lipids and proteins in a constantly changing fluid mosaic
-Plays a dynamic role in cellular activity -Separates intracellular fluid (ICF) from extracellular fluid (ECF) Interstitial fluid (IF) = ECF that surrounds cells |
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Skeletal muscle cells and smooth muscle cells are?
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Cells that move organs and body parts
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cells that store nutrients are?
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fat cells
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Nerve cells are?
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cells that gather information and control body function.
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The cytoplasm is made up of ?:
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INTRAcellular fluid containing organelles, nutrients
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The Plasma membrane is made up of?
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2 phospholipid layers (75%) (Phosphate and lipid)
and Small amounts of cholesterol (stabilize) glycolipids proteins |
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The Phosphate group in the plasma membrane is?
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-water soluble and is the HEAD.
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The lipid part of the phospholipid layer in the plasma membrane is?
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lipid part= tail and is Insoluble in HOH
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______________ make the plasma membrane selectively permeable?
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Phospholipids
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Lipid soluble molecules in the Plasma membrane are?
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freely permeable can move through without help (i.e., O2 & CO2)
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HOH & HOH- soluble molecules in the plasma membrane?
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HOH & HOH-soluble molecules – need help. Cannot pass freely.
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Functions of the plasma membrane?
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1) Protection: keeps cell contents in, extracellular stuff out
2) Selectivity: Selectivity allows substances in and out of the cell 3) Sensitivity: ability to sense and respond to other molecules |
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Plasma membrane lipids
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75% phospholipids (lipid bilayer)
Phosphate heads: polar and hydrophilic Fatty acid tails: nonpolar and hydrophobic 5% glycolipids Lipids with polar sugar groups on outer membrane surface 20% cholesterol Increases membrane stability and fluidity |
