Science Y9 PLC: Flashcards
Name a fact about the cells:
Cells don’t look the same and have different structures to suit their different functions.
What is the definition of differentiation?
The process of a cell changes to become specialised for its job.
What happens when cells change?
They develop different subcellular structures and turn into different types of cells. This allows them to carry specific functions.
Where does differentiation occur?
As an organism develops.
Explain the differentiation in most animal cells:
Lost at an early stage after they become specialised.
Explain the differentiation in most plant cells:
They don’t ever lose this ability of being lost at an early stage.
The cells that differentiate in mature animals are mainly used for?
Repairing and replacing cells such as skin or blood cells.
Name the scientific word for this phrase;
‘Undifferentiated cells’..
Stem cells.
What is the function of a Sperm Cell?
Is to get the male DNA to the female DNA.
What does a sperm cell looks like?
It has a long tail and a streamlined head to help it swim to the egg.
Name two facts about a Sperm Cell:
- Lots of mitochondria in the cell to provide the energy needed.
- Carries enzymes in its head to digest through the egg cell memberane.
What is the Sperm Cell spicialised for?
Reproduction.
What is the function of a Nerve Cell?
Carry electrical signals from one part of the body to another.
Describe what a Nerve Cell looks like:
The cells are long [to cover up distance] and have branched connections at their ends to connect to other nerve cells to form a network throughout the body.
What is a Nerve Cell specialised for?
Rapid Signalling.
