Module 2 Cell Flashcards
Basic structural and functional units of organism
Cell
Cell structure and components
- Cell membrane
- Organelles
Outermost layer enclosing the cytoplasm
Plasma membrane
The movements through the cell
Diffusion, osmosis, carrier mediated, endocytosis and exocytosis
Movement of solute from higher to lower concentration
Diffusion
4 elements of diffusion
Movement of solute
Higher to lower concentration or concentration difference
Time
Semi permeable membrane
Movement of solvents from higher to lower concentration
Osmosis
The pulling force
Osmotic pressure
The pushing force
Hydrostatic pressure
Cells inflate and burst
Hypotonic
Cells shrink
Hypertonic
Cell remains the same
Isotonic
Use of specific protein carrier molecules
Carrier mediated transport mechanism
3 types of carrier mediated transport mechanisms
Facilitated diffusion
Active transport
Secondary active transport
Movement of substance from higher to lower concentration through a SPECIFIC Carrie mediated process
Facilitated diffusion
Movement AGAINST a concentration gradient
Active transport
Uptake of a specific material through the cell membrane by “vesicle”
Receptor mediated endocytosis
Swallowing, solid particle
Phagocytosis
Liquid particle, drinking
Pinocytosis
Specialized structures within the cell cytoplasm
Organelles
Bounded ny nuclear envelope
23 pairs of chromosomes
Directs cell structure and function
Nucleus
Has 2 kinds: organelle attached and unattached (free) protein producing structure
Ribosomes
Membrane forming sacs and tubules
Endoplasmic reticulum
With attached ribosomes synthesizing proteins
Rough ER
No attached ribosomes, site for lipid synthesis
Smooth er
Packages and distributes proteins and lipids from ER
Golgi apparatus
Stores materials within cells
Secretory vesicles
Contains enzymes
Lysosomes
Contains enzymes that breaks down fatty acids, amino and hydrogen peroxide into water and o2
Peroxisomes
Proteins that su[port the cell and enables it to change shape
Cytoskeleton
Specialized zone of cytoplasm where microtuble occurs
Centrosome
Cylindrical organelle composed of 9 triplets
Centrioles
Helps in transport of mucus
Cilia
Longer than cilia used for locomotion
Flagella
Small specialized extensions of cell membrane
Microvilli