CELL SPECIALISATION AND ORGANISATION Flashcards
What do cells become to their function
specialised
What do cells that require a lot of energy have lots of
mitochondria
What do cells that make lots of proteins have lots of
ribosomes
What is an example of a specialised cell and its feature
epithelial cells absorb food, so have villi and micro-villi to increase SA:V, and lots of mitochonfria for energy for transport
What are specialised cells grouped together to form
tissues
What are tissues
a group of cells working together to perform a particular function
What is an example of tissues and what are they composed of
epithelial tissue (made up of epithelial cells)
What do tissues work together to form
an organ
What is an example of an organ and what is it composed of
the stomach, composed of epithelial tissue, muscular tissue and glandular tissue
What do organs work together to form
an organ system
What are 3 examples of an organ system
the digestive system, respiratory, circulatory
What stage are all cells the same
when they are embryos
How are all cells in an organism produced from and what does this mean
mitotic division, they all contain the same genes
Why are some cells different if they all contain the same genes
only certain genes are switched on in each cell
What 2 functions do epithelial tissues have
1) protective
2) secretory
