Description
All living things are made of cells. They may have only one cell, as in bacteria, or they made be made up of trillions of cells, such as in humans. Each cell has structures within it that perform various functions to keep the organism alive.
At A Glance
Cells are the smallest units of life, and all organisms are composed of cells.
Why do cells remain small?
Most cells remain small in order to maintain continuity of the internal parts and to ensure that materials can be easily transported back and forth across the membrane. Having a small size also increases the surface area to volume ratio of the cell. As cells grow larger, their internal volume increases.
What is the lipid bilayer?
The lipid bilayer (a thin polar membrane made of two layers of lipid molecules) is made up of many different substances, all of which contribute to the selectively permeable nature of the cell membrane.
Popular Posts:
- 1. what were the causes course and consequences of the vietnam war
- 2. what online course has earned.coma lot of money
- 3. where is a credit counseling course
- 4. the approach to conflict is being used when both parties negociate on the baics course heroe
- 5. where do i take my hunter safety course
- 6. according to course materials related to advertising, the “got milk” ads are an example of what?
- 7. how long is the business management course
- 8. how to send proof of driver improvement course to florida dmv
- 9. how to force request a course tamu
- 10. what seiu775 online course pays more hourly wages