BIOL 1030 FINAL EXAM QUESTIONS MODULE 1-5

Actin A globular protein that links into chains, two of which twist helically about each other, forming microfilaments in muscle and other contractile elements in cells. active transport Energy-requiring process that moves material across a cell membrane against a concentration difference What is a hemidesmosome? the underlying basement membrane half desmosomes keeps the epithelium from peeling away from the underlying tissue Hydrophilic water loving Hydrophobic Water fearing integral membrane proteins proteins that are embedded in the membrane and cannot be removed without causing damage to the membrane to destroying it Integrins a type of receptor protein found in animal cells , they function t hold together the cell to the extracellular matrix intermediate filaments Threadlike proteins in the cell's cytoskeleton that are roughly twice as thick as microfilaments ; function to provide mechanical support for the plasma membrane when it comes in contact with other cells lumen space within a tubular part or organ, such as the space within a blood vessel Lysosymes A membrane bound organelle that is responsible for degrading proteins and membranes in the cell, and also helps degrade materials ingested by the cell... breaks down macromolecules micille phospholipid molecules that arrange themselves in a sphere with the hydrophobic tails arranged on the inside and hydrophilic heads arranged on the outside Microfilaments Long, thin fibers that function in the movement and support of the cell: composed of actin and found in eukaryotic cells nuclear envelope Double membrane perforated with pores that control the flow of materials in and out of the nucleus.