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Lab 2 - Ex 4 & 5
Membrane transport definitions, epithelial & connective tissues
| Term | Definition |
|---|---|
| kinetic energy | energy of movement |
| concentration gradient | the gradual difference in concentration of a solute in a solvent between two regions |
| uphill movement | movement of a substance against its concentration gradient - from an area of lower concentration to an area of higher concentration |
| downhill movement | movement of a substance with its concentration gradient - from an area of higher concentration to an area of lower concentration |
| equilibrium | the condition of a system such that things are balanced |
| factors that effect diffusion rate | particle size, temperature, and polarity |
| hydrophobic | water-hating - does not mix with water (generally nonpolar) |
| hydrophilic | water-loving - mixes with water (generally polar) |
| amphipathic | a molecule with both hydrophobic and hydrophilic regions |
| osmosis | the diffusion of water across a membrane |
| diffusion | passive transport - net movement in and out of a cell across the membrane along a concentration gradient |
| isotonic | the same concentration inside and outside |
| hypotonic | lower concentration outside than inside |
| hypertonic | higher concentration outside than inside |
| lysis | the swelling, and eventual bursting, of a cell in hypotonic solution |
| crenation | the "shriveling" of a cell in hypertonic solution |
| solute | the substance being dissolved |
| solvent | the substance 'doing the dissolving' |
| semipermeable | permeable to some substances - letting some things through |
| epithelium | membranous tissue of one or more cell layers closely packed together - covering of internal and external surfaces, including bodily cavities and vessels |
| connective tissue | tissue characterized by the abundance of extracellular components (such as fibers and intercellular substances) - connects, supports, or surrounds other tissues and organs |
| squamous | flat, pancake-like epithelial cells - wider than they are tall |
| cuboidal | cube-like epithelial cells - about the same amount high as they are wide |
| columnar | column-like epithelial cells - taller than they are wide |
| simple | one cell layer (epithelium) |
| stratified | more than one cell layer (epithelium) |
| adipose | fat - a type of connective tissue |
Created by:
mlmathis
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