bioexam_2_of_3.txt

A relationship in which the volume of an object increases with the cube of the diameter, but the surface area increases with the square.

Membrane protein that helps cells stick together in tissues.

Molecule that speeds a chemical process without being changed by it.

A cell membrane can be considered a two-dimensional fluid of mixed composition.

Plasma membrane protein that binds to a particular substance outside of the cell.

Plasma membrane protein that tags a cell as belonging to self (one’s own body).

Protein that passively or actively assists specific ions or molecules across a membrane.

A protein filament that projects from the surface of some bacterial cells.

Organelle of protein synthesis.

Series of interacting organelles (endoplasmic reticulum, Golgi bodies, vesicles) between nucleus and plasma membrane; produces lipids, proteins.

Organelle that is a continuous system of sacs and tubes; extension of the nuclear envelope. Rough ER is studded with ribosomes; smooth ER is not.

Organelle that modifies polypeptides and lipids; also sorts and packages finished products into vesicles.

Enzyme-filled vesicle that functions in intracellular digestion.

Double-membraned organelle that produces ATP.

A double membrane that constitutes the outer boundary of the nucleus.

Enzyme-filled vesicle that breaks down amino acids, fatty acids, and toxic substances.

A fluid-filled organelle that isolates or disposes of waste, debris, or toxic materials.

Small, membrane-enclosed, saclike organelle; different kinds store, transport, or degrade their contents.

Short, movable structure that projects from the plasma membrane of some eukaryotic cells.

Dynamic framework of protein fi laments that support, organize, and move eukaryotic cells and their internal structures.

Cytoskeletal element that locks cells and tissues together.

Reinforcing cytoskeletal element; fiber of actin subunits.

Cytoskeletal element involved in movement; hollow filament of tubulin subunits.

Type of energy-using protein that interacts with cytoskeletal elements to move the cell’s parts or the whole cell.

Extendable lobe of membrane-enclosed cytoplasm.

Cell junction that anchors cells to each other or to extracellular matrix.

Structure that connects a cell to another cell or to extracellular matrix.

Cell junction that forms a channel across the plasma membranes of adjoining animal cells.

Arrays of fibrous proteins; join epithelial cells and collectively prevent fluids from leaking between them.