Cell Structure and Transport
Terms in this set (31)
What does the cell theory state?
Cells are basic units of life, all living things are made up of cells & all cells are produced by existing cells
Who was the first person to identify and see cells?
The discovery of cells was made observing which type of cell?
__________ are the smallest units of life in all living things.
Why is surface area an important factor in limiting cell growth?
The cell may become too large to take in enough food and to remove enough wastes
Why would a cell that can change its shape be well suited for moving to different tissues through narrow openings?
Moving to different tissues through narrow openings
Describe the relationship between the structure and function of muscle cells (how does their shape relate to what they do)?
Muscle cells are long and slender, like a rope, and that allows them to pull, which helps them perform their function of pulling your body parts
What is the difference between eukaryotes and prokaryotes?
Eukaryotes- Single or mutlicellular organisms... have nucleus and membrane bound organelles... plant & animal cells are eukaryotes
Prokaryotes- Generally single celled organisms like bacteria... do NOT contain a nucleus or other membrane organelles.
Studying a picture of a cell taken with an electron microscope, you can find that the cell has a nucleus, several membrane bound organelles including lysosomes, a plasma membrane and NO cell wall. You conclude that the cell is probably from what kind of cell?
Eukaryote, Animal cell
Studying a picture of a cell taken with an electron microscope, you find that the cell has no nucleus and no mitochondria, but it does have a plasma membrane and a cell wall. You conclude that the cell is probably from what kind of cell?
Prokaryote, Bacteria Cell
Which organelle receives proteins and lipids from the endoplasmic reticulum, packages them, and release them in vesicles?
Where is a cell's ATP produced?
Which organelle make proteins?
What does the plasma membrane do?
Separates cell from its external environment, gives cell its shape, metabolism & communication
The double membrane surrounding the nucleus is called the?
What is present in ALL CELLS (whether they are prokaryotes or eukaryotes)?
DNA, cytoplasm, ribosomes, plasma membrane
Compare and contrast plant and animal cells.
Plant: chloroplasts, cell wall & central vacuole (not found in animal cells)
Which organelle is involved in photosynthesis and contains chlorophyll?
What is Diffusion?
Do not require energy. Molecules goes from high to low concentration.
What is facilitated diffusion?
Not all molecules can pass through membranes. (Glucose, Amino Acids, Ions). Carrier Proteins transport large molecules. Ion channels allow ions to cross the membrane.
What types of cell transports do not expend energy (passive)?
Diffusion, facilitated diffusion, osmosis, ion channels
What types of cell transports do expend energy (active)?
Membrane pumps, endocytosis, exocytosis
Plant cells have a large membrane-bound organelle in which water, waste products, and nutrients are stored. What is this organelle called?
List several examples of substances that must enter a cell by active transport.
Potassium ions, large molecules
The process by which water passes into or out of a cell is called?
What will happen to a plant in a hypertonic environment?
Water moves out of a cell and cell shrivels up
What is plasmolysis?
Cells shrink due to hypertonic solutions
What is Cytolysis?
Cells burst due to hypertonic solutions
Ridding cell of material by discharging it from sacs at the cell surface is called?
Molecules that are too large to be moved through the membrane can be transported into the cell by?
The mesh-like network of protein fibers that supports the shape of the cell is called the _______.
cytoskeleton (microtubules & microfilaments)