Most human cells , like most animal cells contain (5 things) :
A nucleus , cytoplasm, cell membrane , mitochondria and ribosomes
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What do plant and algal cells contain that animal cells dont
a rigid cell wall (for support), chloroplasts(containing chlorophill) and a permanant vacuole filled with sap
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Why are plant cells different to animal cells
because they have different functions
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All living things are made of :
cells
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which is bigger bateria or plant/animal cells
plant/animal cells bacterial are much smaller
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how many cells does yeat have
yeast is a single cell organism (which is different from animal and plant cells)
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do bacteria have a cell membrane and a cell wall
yes
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do bacteria have a nucleus
no so the genetic materia is in the cytoplasm
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are cells specialised
yes , to carry out a specific function eg fat cells , root hair cells etc
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what does the structure of a cell tell us
it gives us a clue to its function
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what do neurons do
they are specialised to carry impusles from recepters to the CNS
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Why do muscle cells need lots of mitochondria
to release energy which muscles need for movement
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what does a nucleus do
controls cells activities and carrys genetic materia
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what happends in the cytoplasm
chemical reactions
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what does a cell membrane control
what materials go in and out of the cell
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in which part of the cell is energy released during repiration
mitochondria
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what takes place in the ribosomes
protien synthesis
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why do plant cells have a cell wall
for support
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why do plant cells have chloroplasts
for photosynthesis
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can bacterial colonies be seen by the naked eye
yes but single bacteria cant be
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how do dissolved substances move into and out of cells
by diffusion
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when does diffusion occur rapidly
when there is a larger difference in concentraition
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what is diffusion
the spreading out of the particles of a gas or any substance in a solution
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what does the net movement into or out of cells depend on
the concentraition of the particles on each side of the cell membrane
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why will there be a net (overall) movement from an area of high concentraiton to an area of lower concentration
Because the particles move randomly
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what is the difference between to areas called
concentraition gradient
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the larger the difference in concentraition the faster the rate of ....
diffusion
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what is an exampple of diffusion
oxygen cells into the cells of the body frm the bloodstream as the cells are respiring , the diffusion of carbon dioxide into activley photosynthesising plant cells etc
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what is a tissue
a group of cells with similar structure and function
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what are organs made of
several tissue types
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give examples of animal tissues
muscle tissues (which can contact to bring movment) , glandular tissues (to produce substances such as enzymes or hormones) , epithelial tissue (which covers some parts of the body)
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give examples of plant tissues
epidermal tissue(which covers the plant) , mesophyll (which can photosynthesise) , xylem and phoem ( which transport substances around the plant)
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what is the levels of complexity in multicellular organsims
cell,tissue,organ,system,whole bosy
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what are the cells during the development of multicellular organisms
differentiate
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what is the stomach organ made of
muscular tissue ( to churn stomach contents) , glandular tissue (to produce digestive juices) and epithelial tissue (to cover the outside and inside of the stomach
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the leaf steam and root are plant organs they contain which tissues
epidermal , mesophyll, xylem and phloem
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what do groups or organs form
organ systems ( to perform a particular function)
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the food you eat must be changed into ...
... soluble molecules from insoluble molecules so they can be absorbed by the blood
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the digestive system is a muscular tube which includes
glands ;the pancreas and salivary gland(prouce digestive jucies)the stomach&small intestine(digestion occurs)the liver(produces bile)the small intestine (absorption of soluble food occurs)and the large intestine(where water absorbed prodocing faeces)
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Other cards in this set
Card 2
Front
What do plant and algal cells contain that animal cells dont
Back
a rigid cell wall (for support), chloroplasts(containing chlorophill) and a permanant vacuole filled with sap
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