random
Who 1st observed and named cells?
Robert Hooke
Groups of cells with a common structure and function are called
Tissues
what is a vacuole?
storage site for food, water, and waste
How does the plasma membrane maintain homeostasis?
selectively permeable
molecules move from a area of higher concentration to an area of lower concentration
What is diffusion
able to carry out all the functions necessary for life
What are the cells of unicellular organisms
What makes protein and protein synthesis?
ribosomes
Which part of the microscope do you look through to see the object magnified?
eyepiece lens
What is the cell membrane made up of
What is a phospholipid bilayer
what is the main function of the mitochondria?
breaks down and releases energy
An animal cell that is surrounded by fresh water will burst because the osmotic pressure causes
water to move into the cell
portion of an organelle that is studded with ribosomes
Rough ER
What is the function of the chloroplast?
photosynthesis
a process which a cell engulfs extracellular material through an inward folding of its plasma membrane
What is endocytosis
Some materials can move across the cell membrane against a concentration gradient by ______________________.
Active Transport
a single celled organism that does not have a nucleus or membrane bound organelles; examples are archaea and bacteria
prokaryotic
Which organelle converts the chemical energy stored in food into useable energy
Mitochondria
What are 3 distinguishing characteristics of a plant cell?
1. cell wall
2. chloroplast
3. large vacuole
What is exocytosis
Term that describes a membrane that regulates the flow of materials into and out of the cell
Selective Barrier
What is a cell?
basic unit of organization
What controls all cell activities
nucleus
The cell’s genetic information is found in the cell’s nucleus as threadlike _______________________, which are made of chromatin and protein
Chromosomes
What is the function of a lysosome?
digest extra organelles and bacteria
solute concentration is greater than that inside the cell- so the cell loses water
hypertonic solution