Cell Structure Flashcards
What is the cell theory?
All living things are made up of one or more cells
Cells are the basic unit of structure and functions in organisms
All cells arise from existing cells
How were cells discovered (Robert Hooke & Anton Van Leewenhook)
Microscope observation
What is the difference between a Plant cell and a human cell?
Human cells or flats and plant cells are rectangular
Plant cells create their own food to photosynthesis and human cells do not
Human: No cell wall
Plants: Cell wall
What does a cell’s shape reflect?
It’s function
What is a prokaryote?
No nuclei. DNA is not separated from the rest of the cell. Usually unicellular.
What is a eukaryote?
Contains nucleus that separates DNA from the rest of the cell. ,softly multicellular
What is the difference between a eukaryote and a prokaryote?
The eukaryote has a more complex organization which enables it to carry out more specialized functions than the prokaryote.
Cell membrane
The cells outer boundary
Cytsol
The fluid inside the cell
Cytoplasm
Includes this fluid and almost all of the structures that are suspended in the fluid
Ribosome
A cellular structure on which proteins are made
Schleiden
A German Botanist
Made the discovery that cells make up every part of the plant
Schwann
A German zoologist
Discover the animals are also made up of cells, like plants
Virchow
A German physician
Proposed that sells come only from the division of existing cells
What is a cytoskeleton?
The cytoskeleton provides an internal superstructure for the typical eukaryotic cell. Microtubules and microfilaments help to organize the cytoplasmic structure of the cell and play key role in linking the cell membrane to internal structures and also serve as a transport network for moving vesicles through the cell. In a cell like a neuron, the cytoskeleton creates transportation networks so that important proteins can be delivered from the cell body, where they are made, to distant locations at the end of the cellular processes such as the axon and the dendrites.