Science 1 Cells Flashcards
What is a nucleus
It controls the cell and is found in both animal and plant cells
-holds dna
What is cell membranes
It protects the cell and filters what goes in and out the cell
It is found in plant and animal cells
What is an organism
It’s a living creature made up of cells
What is a cell
Cells are the basic building blocks of all living things. A group of the, can make tissue which can soon make organs
Define microscope
They magnify miniature cells so they we are able to study them clearly
Where is cell wall found in animal cells or plant cells
It is found only in plants
What is cytoplasm
It makes the cell jelly like it it is the liquid inside the cell
-chemical reactions take place here
What is a unicellular cell
an organism that is made up of one cell
What is a flagellum
It is a tail that helps the cell to swim and survive
What do red blood cells carry
They carry oxygen around the body
What is a total magnification made up of
Eyepiece lens x objective lens magnification
What are chloroplasts
The hold chlorophyll which provides pigment to dye the colour of the cell
What is the cell wall
It ensures full security of the cell and allows it to be firm and hold up well.
It is found only in plants
Mitochondria
Respiration takes place here
Vacuole
Plant component
- contains cell sap
- keeps cell firm
- two types
Two types of vacuole
- food vacuole = digests food
- contractile vacuole = removes waste
Cilia
-assist with movement
-
Specialised cell
A cell whose structure allows them to perform certain functions
Nerve cell
An animal cell that transmits electrical impulses around the body
Red blood cells
Animal cell
-transports oxygen around the body
Root hair cell
- plant cell
- absorbs water /minerals from soil
Sperm cell
-contains male genetic info
Leaf cell
- contains lots of chloroplasts
- lots of photosynthesis happens
Factors of nerve cell
- long and thin
- have connections at each end to join to other nerve cells
- helps transmit messages
Red blood cell factors
- contains haemoglobin
- no nucleus
- disc shape increases surface area
Sperm cells factors
- no nucleus
- stream lined = move faster
- tail = swim
- lots of mitochondria = lots of energy
Leaf cell factors
-found on top of leaf
-allows to absorb as much sun light for photosynthesis
-
Root hair cell factors
- absorb nutrients
- hair increases surface area
- no chloroplasts as there is no sunlight underground
Plants wilt because
- lack of water
- shrink vacuole
- cell wall weakens
- plant cell becomes floppy and wilts
Amoeba
Unicellular organisms
Euglena
Unicellular organism performs photosynthesis
Amoeba factors
- no fixed shape -shape like blob of jelly
- found in fresh water/salt water/wet soil / inside animals
- eat bacteria/algae = engulfs it
- reproduce via binary fission
Euglena factors
- found in fresh water
- food = photosynthesis
- eye spot detects light
- flagellum =swims
- engulfs food if cannot make enough of their own food
