Chapter 3: Cells and Tissues - Histology Flashcards
What are the 4 different types of tissue and their main function?
Connective tissue - supports, connects, protects
Epithelial tissue - lines and covers
Muscular tissue - provides movement
Nervous tissue - allows for control and communication of information
Cells are …
The basic unit of activity in the body.
Each one has its own independent life. It takes raw material, processes then and creates products and waste
How many cells make up our body?
About 50 trillion
A bacteria is …
A single, self contained living cell consisting of a cell membrane, Cato plasm, enzymes and a ball of DNA.
What is the Ancient Greek philosophy that means patterns found on the largest scale are repeated in the smallest?
The microcosm in the microcosm, and the microcosm in the microcosm.
Describe the cell membrane…
2 layers of Phospholipids facing away from each other so that the electrically charged heads face outward and their neutral fatty acid tails are in the middle.
Essential fatty acids are those that _____.
Cannot be made by the body - they must be eaten.
Osmotic pressure determines ______.
When water enters and leaves the cells. It is determined by the concentration of salts inside or surrounding the cell.
How do Omega 3s help the cells?
Helps make the cell membrane more elastic and fluid so signals can pass through effectively
