1.
Cell theory
1.1 Introduction to Cells
Cells & Biomolecule
Theory that states that all
organisms are composed of
cells, cells are the smallest
independent unit of life and
that all cells come from pre-
existing cells.
Differentiation
1.1 Introduction to Cells
Cells & Biomolecule
The alteration of a cell’s
morphology and physiology
through changes in gene
expression.
Emergent property
1.1 Introduction to Cells
Cells & Biomolecule
A property of a system that
emerges from the
interaction of the elements
of the system, where the
whole is more complex than
the sum of its parts.
Growth
1.1 Introduction to Cells
Cells & Biomolecule
An increase in physical size.

2. Homeostasis
1.1 Introduction to Cells
Cells & Biomolecule
The process in which an
organism regulates activities
within cells and their bodies
to keep conditions stable.
Magnification
1.1 Introduction to Cells
Cells & Biomolecule
Ratio of image size to actual
size.
Metabolism
1.1 Introduction to Cells
Cells & Biomolecule
The sum of all of the
chemical reactions that
occur within an organism or
within a cell.
Paramecium
1.1 Introduction to Cells
Cells & Biomolecule
Genus of single-celled
ciliated organisms that show
all signs of life.

3. Response
1.1 Introduction to Cells
Cells & Biomolecule
In behavioural science, the
behaviour that is the
consequence of a stimulus.
Scale bar
1.1 Introduction to Cells
Cells & Biomolecule
A means of visually
indicating the magnification
of an image.
Stargardt’s disease
1.1 Introduction to Cells
Cells & Biomolecule
A degenerative eye disease
that has been the target of
stem cell therapy.
Stem cell
1.1 Introduction to Cells
Cells & Biomolecule
A relatively undifferentiated
cell that can give rise to
other types of cells and
retains the ability to divide.

4. Surface area to
volume ratio
1.1 Introduction to Cells
Cells & Biomolecule
A variable that decreases as
cells grow, so that it sets a
limit to the size of cells.
System
1.1 Introduction to Cells
Cells & Biomolecule
A level of organization that
emerges due to the
interaction of elements.
Tissue
1.1 Introduction to Cells
Cells & Biomolecule
A group of cells with a
common function and
structure.