Intro to Cells
The first principle of cell theory
Every living thing is made up of one or more cells
Another name used for mitochondria
Powerhouse of the cell
yeast, amoebas, fungi, and algae are examples of what type of organism
Unicellular
Humans can be organized into what 4 components?
Cells, Tissues, Organs, Organ Systems
The movement of particles from a higher concentration to a lower concentration
Diffusion
The third principle of cell theory
Cells come only from other living things
Responsible for making proteins in the cell
Ribosomes
The difference between unicellular and multicellular organisms
unicellular: made of one cell that performs all functions
multicellular: made of many cells that take on specialized functions
A group of cells that join together to serve a similar function
Tissue
This process involves the diffusion of water through a selectively permeable membrane
Osmosis
The average number of cells humans have
37 trillion
The function of lysosomes
Responsible for cleaning up the cell, by getting rid of waste
Unicellular organisms obtain nutrients through these two options:
Photosynthesis or coming in contact with other unicellular organisms
Responsible for stability and movement
Musculoskeletal system
True or False: Water moves toward the side with less solute during osmosis
False
The second principle of
Cells carry out the functions needed to support life
Animal cells have this organelle that helps in cell division; plant cells do not
Centrioles
Humans are classified as ______________ because they are multicellular organisms with a nuclus and organelles enclosed by membranes
Eukaryotes
Act's as your body's protective outer layer
Integumentary system
A cell releasing large hormone molecules into the bloodstream is an example of what process?
Exocytosis
The size of an average human cell
10 micrometers
A network of membranes within a cell that transports proteins and lipids
Endoplasmic Reticulum
True or False: Unicellular organisms can be eukaryotic or prokaryotic
True
How many organ systems do humans have?
11
Name the three components of cytosis
Endocytosis, exocytosis, transcytosis