Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
BIOL 1101 Exam Two
Pre-Class Notes, Sept 24
| Question | Answer |
|---|---|
| What are the three types of fibers within protein fibers of the cytoskeleton | microfillaments, intermediate filaments, and microtubulus |
| What is the function of microfilaments | function in cellular movements |
| What are microfilaments made out of | comprised of 2 globular protein strands called actin |
| What is ATP role in microfilaments | powers actin to assemble into filamentous form, track for movement of motor protein called myosin |
| What are intermediate filaments | several strands wound together |
| What is the function of intermediate filaments | no role in cellular movement, only structural; tension allows cell to maintain shape |
| What are microtubules mad of | Alpha-tubulin and Beta-tubulin |
| What are the functions of microtubules | help cell resist compression, provide track for vesicles to move through cell, put replicating chromosomes on opposite ends of the dividing cell |
| What are flagella | hairlike structures that extend from plasma membrane, allow for entire cell to move |
| What is included in the extracellular matrix | Collagen protein, protoglycans |
| How does the matrix hold cells together | Cells have protein receptors on plasma membrane, when molecule binds to receptor, changes receptor's structure, changes microfilament conformation, induces chemical change to turn on/off DNA transcription, changes proteins made |
| What is an example of cell signaling in the extracellular matrix | blood clotting, when cells lining a blood vessel are damages, they display a protein receptor |
| How does endocytosis work | Cell's plasma membrane invaginates, forms a pocket around target particle, pocket pinches off, creating new intracellular vesicle within membrne |
| What is phagocytosis | When cell takes in large particle |
| How does phagocytosis work | Clathrin protein coats plasma membrane that faces inward, extends from cell and surrounds particle, clarthin disengages from membrane and merges with lysosome, breaks down in endosome, releases digested contents |
| What is pinocytosis | Process where cell takes in molecules and water, which cell needs extracellular fluid for process of pinocytosis |
| How does pinocytosis work | Caveolin protein coats plasma membrane section |
| What is receptor mediated endocytosis | Clathrin attaches to plasma membrane after receptor from cell signaling indicates, polymerizes a coat into vesicle to bring things from outside the cell |
| How does endocytosis of cholestrol work for LDL | Serum cholesterol bound by LDL, floats around the blood stream until it meets with an LDL receptor on the surface of a cell, LDL receptor near clathrin-coat pits, clathrin self-assembles into vesicles and pinches off, vesicle fuses wih endosome, proton pu |
| What are secretory vesicles | Proteins that are packages and delivered for outside the cell |
| What is constitutive exocytosis | Protein from ER migrates to Golgi Apparatus, leave golgi through secretory vesicles, since they have no signaling, there is no control over secretion |
| What happens to vesicles after constitutive exocytosis? | Vesicles contribute new lipids and its own membrane to the cell membrane |
| How does regulated exocytosis work | vesicles containing the product near cell's surface remain there until specific signal arrives that triggers secretion |
| What is an example of regulated exocytosis | pancreatic beta cells regulate exocytosis of secretory vesicles with insulin |
Created by:
goldengalleon