Specialised cells Flashcards
1
Q
What is the general process of cell specialisation?
A
- The first group of cells in embryo are initially identical
- Cell becomes specialised in structure to optimise function when matured
2
Q
What is the general process of cell specialisation?
A
- The first group of cells in embryo are initially identical
- Cell becomes specialised in structure to optimise function when matured
3
Q
Are all genes used in specialised cells?
A
No some genes are switched on other off depending on the cell
4
Q
What varies in different specialised cells?
A
- Shape
- Number of organelles
5
Q
What is the relationship between specialised cells and multicolour organisms?
A
- Specialised cells have evolved to become more and more suited to one function
- Organism functions more efficiently
6
Q
What is a tissue?
A
A group of similar cells organised into a structural unit that serves a particular function
7
Q
How are epithelial tissues specialised?
A
- Consist of sheets of cells
- Line surface of organs > have a protective or secretory function
8
Q
Example of epithelial cells?
A
- Epithelial cells which are thin and line the surface of organs where diffusion takes place > alveoli
9
Q
What is an organ?
A
A combination of tissues that are coordinated to preform a variety of functions (predominately one function)
10
Q
What is an example of an organ?
A
- Stomach > muscle tissues to churn and mix stomach contents
- Epithelium to protect stomach wall and produce secretions
- Connective tissues to hold other tissues together
11
Q
What is an organ system?
A
- Organs working together a single unit to preform particular functions
- May be grouped together for efficiency
12
Q
What is an example of an organ system/
A
- The respiratory system > used for breathing and gas exchange > made up of organs such as trachea, bronchi, and lung
