B2 - Cells Flashcards
What do you find in a plant cell
- Cell wall
- cell membrane
- nucleus
- cytoplasm
- chloroplasts
- ribosomes
- mitochondria
- vacuole
What do you find in an animal cells
- Cell membrane
- mitochondria
- ribosomes
- nucleus
- cytoplasm
What do you have in a bacteria cell
- Cell wall
- cell membrane
- cytoplasm
- ribosomes
- circular DNA
- plasmids
What is the function of plant cells
Photosynthesis
How are new cells produced
By the division of existing cells
What is the function of ciliated cells
Move the mucus in the trachea & bronchi
What is the function of root hair cells
Absorption of water & minerals for the plant
What is the function of palisade mesophyll cells
Photosyntheses
What is the function of neurones
Conduction of electrical impulses
What is the function of Red blood cell
Transport oxygen
What is the function of sperm & egg cells (gametes)
Reproduction
What is the meaning of the term cell
the smallest, basic unit of life that is responsible for all of life’s processes
What is the meaning of the term tissue
an ensemble of similar cells from the same origin that together carry out a specific function
What is the meaning of the term organ
the group of tissues that perform a specific function in the body
What is the meaning of the term organ system
a group of organs that work together to perform one or more functions
What is the meaning of the term organism
Any living thing
How do you find magnification, image size and actual size
Magnification = image size/ actual size
Image size = Magnification x actual size
Actual size = image size / magnification
Hon do you convert mm to μm
mm x 1000 = μm
What is the definition of diffusion
The het movement of particles from a region of higher concentration to a region of lower concentration, down the concentration gradient as a result of their random movement
What effects diffusion
- surface area ~ larger makes more diffusion
- temperature ~ particle gain energy & move faster
- concentration gradient ~ the smaller the concentration gradient the faster the diffusion
- distance ~ the more area the slower diffusion
What is the definition of osmosis
The het movements of water molecules from a region of higher water potential (dilute solution) to a region of lower water potential (concentrated solution), through a partially permeable membrane
What does the word turgid mean
Firm
What does the word flaccid mean
Soft
What is turgor pressure
the force within the cell that pushes the plasma membrane against the cell wall
