Admin Table of Contents
What part of the cell allows things in and out?
The cell membrane
The cell membrane controls what moves in and out of the cell. Cell membranes only allow some solutes (solids) to move across it.
What part of the cell controls things?
The nucleus, formed by a nuclear membrane around a fluid nucleoplasm, is the control center of the cell. Threads of chromatin in the nucleus contain deoxyribonucleic acid (DNA), the genetic material of the cell.
How do things move in and out of the cell?
Substances move in and out of cells by diffusion down a concentration gradient, through a partially permeable membrane. Selected substances can move up a concentration gradient with the help of specialized molecules embedded in the membrane. This is called assisted diffusion or active transport.
What organelle controls cell activities?
the nucleus
Each of your cells has a boss, too: the nucleus. This control center runs the show, instructing the cell to carry out basic functions, such as growth, development and division. Most of your body’s genetic material — its deoxyribonucleic acid, or DNA — is located inside the nucleus.
How is cell wall different from plasma membrane?
Plasma membrane is semi-permeable, and cell wall is entirely permeable. Apart from these, the most fundamental difference between plasma membrane and cell wall is that the former one is present in the inner lining of all cells while the latter one protects the membrane (specific cells).
What are the differences between cell wall and cell membrane?
Difference between Cell Wall and Cell Membrane
| CELL WALL | CELL MEMBRANE |
|---|---|
| It is the thick and rigid structure with a fixed shape. | It is a thin and delicate structure. It is flexible to change the shape as needed. |
| It protects the cell from the external environment. | It protects and maintains the internal environment of the cell. |
How does osmosis move in and out of cells?
Water moves across cell membranes by diffusion, in a process known as osmosis. Osmosis refers specifically to the movement of water across a semipermeable membrane, with the solvent (water, for example) moving from an area of low solute (dissolved material) concentration to an area of high solute concentration.