Ch. 3 Cells Flashcards
Define Cells
The basic building block of an organism
Define Pathology
The study of disease
List 4 Cell Shapes
- Round
- Spherical
- Rectangular
- Irregular
Function and structure of the flagellum (and example)
- Whip like structure
- Function: Locomotion
- EX: Sperm
Function and structure of cilia
- Hair like projection
- Function: Locomotion, removing substances from the surface
Function and structure of villi
- Finger like projection
- increase the surface area
What are the 2 processes across the cell membrane?
- Passive process
- Active process
What is passive process?
Movement from high to low concentration
What are the types of passive process?
- Diffusion
- Simple diffusion
- Facilitated diffusion
- Osmosis
- Filtration
What is active transport?
A mechanism of transport that requires energy; Moves from low to high concentration
What are the types of active process?
- Endocytosis
- Phagocytosis
- Pinocytosis
- Exocytosis
Define simple diffusion and give an example
Movement from high to low concentration
EX: Oxygen and carbon dioxide molecules exchange in the lungs
Define facilitated diffusion
Movement from high to low concentration with the help of a protein
Define osmosis
Movement of water through the membrane from high to low water concentration
What are the types of osmosis
Isotonic, hypertonic, hypotonic
Isotonic
A solution with the same osmotic pressure as body fluids causing no change to the cell