Cell membrane Flashcards
Lysosomes:
waste and recycling plant of the cell destroyer of invading disease-causing cells
Chloroplasts:
trap the sun’s energy for the biosphere only found in plant cells
Centrioles:
crucial for cell division and only found in animal cells
Endoplasmic reticulum:
high-way transport system for the cell
rough er:
rough because of ribosomes attached
smooth er:
lacks ribosomes
vacuoles:
warehouses of the cell factory receive store and release necessary materials
mitochondria:
powerhouse of the cell, converts glucose to usable energy for the cell, found in every cell in large numbers
cell organelles:
work together to make the cell work
Cell membrane:
Responsible for movement of material in and out of the cell.
Cell membrane:
Separates cell contents from the outside environment
Cell wall:
A strong wall outside the cell membrane also provides support for the plant cells because they have no skeleton
Nucleus:
Directs any activities of the cell and contains genetic material (DNA)
Cytoplasm:
Jelly-like substance that supports organelles inside the cell
Cytoskeleton:
Networks of protein fibers that support cell shape, anchor of organelles, and provide transport paths between the organelles
Ribosomes:
Site of protein synthesis, assembled in the nucleolus of a cell
Golgi apparatus:
The packing plant
3 functions of a cell membrane:
- Cell barrier: keeps baddies out and keeps organelles in
- Organization: membranes surround and package materials in vesicles
- membranes organize complex reactions like photosynthesis and cellular respiration
- Selective filters: are Semi-permeable and only allow certain substances in or out
- regulated by particle size and by selective transport by membrane proteins
Fluid mosaic model:
cell membranes are constantly moving and changing, changing the positions of the proteins lipids, and carbohydrates embedded in the membrane changing the mosaic to meet changing needs
Carbohydrate chain:
for cell-to-cell communication
Cholesterol:
maintains proper membrane flexibility, and is crucial for cell signaling and nerve conduction
where are membrane proteins located?
can be peripheral (on the surface) or integral (spans the membrane)
Why are proteins crucial?
for transport of substances in and out of the cell
