Cells Flashcards
What is a cell
Cells are basic units of life that can carry out all life processes
What is a unicellular organism
Organisms that consist of only one cell
What is a multicellular organism
Organisms that consist of more than one cell
What is organelles
Organelles are groups of complex substances inside a cell which carry out specific functions within the cell
What is protoplasm
It is the living contents of a cell that is surrounded by the cell membrane
What is a specialised cell
A cell that is designed to do a particular task in an organism
What is division of labour
It refers to each type of cell that specialises in performing one particular function
What is the structure of the nucleus
-contains hereditary materials called chromosomes which are made up of DNA. Info that DNA contains is passed from one generation to the next
What is the function of the nucleus
The “control centre” as it controls all activities that take place in a cell such as cell growth and repair
What is the structure of the cell membrane
- forms a boundary between cytoplasm and the outside of the cell
- A semi permeable membrane which allows certain substances to pass through only
What is the function of the cell membrane
Controls all movement of substances in and out of the cell
What is the structure of cytoplasm
- gel-like fluid in which many organelles and dissolved chemicals are found
- made up of water mainly
What is the function of cytoplasm
It is where most chemical reactions take place
What is the structure of vacuole
- membrane bound bubbles
- animal cells have small and numerous vacuoles
- plant cells have one large vacuole
What is the function of vacuole
- in animal cell, store dissolved nutrients and mineral salts
- in plant cells, it is filled with cell sap which stores nutrients and mineral salts. It also provides turgidity to the cell by pushing the cytoplasm outward against the cell wall
