Chapter 3 Questions Word Scramble
|
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
Question | Answer |
Describe the structure of a cell membrane and explain how this structural organization provides the membrane's function | double layer of phospholipid molecules that self assemble///heads form outer and tails form interior |
List three functions of membrane proteins | receptors for communicating, help move small molecules and ions in and out of membrane, allow cells to touch or bind |
Golgi Apparatus | sacs that package and modify protein molecules for transport and secretion |
Mitochondria | sacs that release energy from food molecules and convert the energy into a usable form |
Peroxisomes | sacs that contain enzymes capable of digesting worn cellular parts |
Cilia | projections attached beneath membrane that propel fluids |
Endoplasmic Reticulum | connected sacs, canals, and vescicles that transports materials in the cell and synthesize lipids |
Cytoskeleton | network of microfilaments and tubules that provide support and structure for the cell |
Vescicles | sacs that contain substances that recently entered the cell and stores and transports newly synthesized molecules |
Ribosomes | particles composed of protein and RNA molecules that synthesize proteins |
List the parts of nucleus and explain why each is important | nucleolus- composed of protein and RNA molecules that is the site of ribosome formation///chromatin-fibers composed of protein and DNA that carries info for synthesizing proteins |
Simple diffusion | molecules movement through bilayer from region of high con. to low con. |
Facilitated diffusion | ions move through channels or carrier molecules across membrane from high con. to low con. without energy |
filtration | hydrostatic pressure forces small substances through a membrane |
active transport | movement against a concentratin gradient with a carrier protein and energy input (low con. to high con.) |
endocytosis | the cell membrane engulfs a particle drawing it into the cell |
exocytosis | a particle exits the cell |
Define osmosis | movement of water across a selectively permeable membrane into a compartment containing solute that cannot cross the same membrane |
Distinguish among hypertonic, hypotonic, and isotonic solutions | isotonic-same osmotic pressure of body fluids, hyper-higher, hypo-lower |
The period of the cell cycle when DNA replicates is | S phase |
Describe the events of mitosis in sequence | prophase, metaphase, anaphase, telophase |
List five factors that control when and if a cell divides | telomeres, waxing and waning levels of kinases and cyclins, cell size, hormones and growth factors, space availability |
A stem cell | self renews |
Created by:
wmisaacharris
Popular Anatomy sets