B1 Flashcards
Animal cell structure and functions
Name all the cell features common to animal cells
Nucleus, cytoplasm,cell membrane, mitochondria and ribosomes
Nucleus function
Contains genetic materials which control activities of the cell
Cytoplasm function
Where most of the chemical reactions happen. It contains enzymes.
Cell membrane
Controls what goes in and out
Ribosomes
Where protiens are made in the cell
PLANT CELLS
True or false: plant cells contain the same cells and animal
TRUE. however have some of there own: Cell wall, permanent vacuole,chloroplasts
Function of cell wall
Supports cell and strengthens it
Function of chloroplasts
Where photosynthesis occurs, they contain a subsentnce called chlorophyll which aborbs light needed for photosynthesis
Light microscopes magnify to what, compared to electron magnify?
x2000 light
x2,000,000 electron
What is the equation for magnification and its re-arrangments
MAGNIFICATION= IMAGE SIZE
————-
REAL SIZE.
(MxR=I)(I/M=R)
Are eukaryotic cells,cells like animal or plant cells/ or cells like bacteria
Animal/plant
This is the opposite to PROKARYOTIC CELLS (eg bacteria)
What are animal and plant cells specialised to function within ?
Within a tissue, organ systems and the whole organism
Examples of animal cells and its specialised
Sperm cells- reproduction
Muscle cells- contraction
Examples of plant cells and its specialised
Root hair cells- absorb water and minerals
Phloem and xylem - transporting substances
What is diffusion
The spreading out of particles from an area of high concentraction on am area of low concentraction
What is the rate of diffusion affected by
The difference of concentration,temp and available surface area
Diffusion happens in solutions and gasses
What can Dissolved substances like glucose and gases like oxygen,CO2 do?
Move in and out of cells by diffusion.
What Is osmosis
Special case of diffusion- movement of water molecules across partially permamble memebrane from region on higher water concentration to low.
Investigating osmosis in plant cell practical steps: use page 18 of cgp.
:)
What does active transport do?
Moves substances from a more dilute solution to a more concentrated solution.
Active transport uses energy from what and why?
Energy released from food in respiration to provide energy required
What does active transport allow plant root hair cells to absorb
Absorb mineral ions required for healthy growth from very dilite solutions in soil to against a concentration gradient.
Exchanging surface use page…
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