Lesson 4 Cells
Completion requirements
Introduction
How do single-celled organisms carry out life functions?
AS2.1 Single-celled organism called Amoeba
How single-celled organisms carry out life functions is an excellent question and one that scientists have been studying for years. Just when we think we know everything there is to know about a cell, we find a new function or a new type of cell to
study. Cells are fascinating structures and scientists are constantly amazed by them.
In this section, we will look at the different structures inside of a cell (called organelles) and the functions they perform. We will also look at the differences between plant and animal cells, as well as the reason behind the size of cells. Then we will discuss how this knowledge has impacted society.
In this section, we will look at the different structures inside of a cell (called organelles) and the functions they perform. We will also look at the differences between plant and animal cells, as well as the reason behind the size of cells. Then we will discuss how this knowledge has impacted society.
Targets
By the end of this section, you will be able to
AS2.2 Paramecium and the food it has eaten (coloured)
AS2.3 Plant vs. animal cell
AS2.4 Diagram of the cell Membrane
© CNX OpenStax, via Wikimedia Commons
AS2.5 Relative cell sizes
AS2.5 Relative cell sizes
AS2. 6 Medical research
- describe the cell as an open system
- identify the structures and functions in plant and animal cells and the difference between those cells
- describe the role of the cell membrane in moving particles into and out of the cell and understand the different kinds of passive transport and active transport
- describe cell size and shape as they relate to the surface area to volume ratio and explain how that ratio limits cell size
- identify how microscopic research and knowledge about the cell membrane has affected society