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General Structure Of Cells
Transcript of General Structure Of Cells
Describe the main characteristic of a
They have a nucleus that stores their genetic information.
Eukaryotic cells have internal membranes, which create compartments inside the cells that have different functions.
Specialization-The adaptation of an organism or organ to a special function or environment
General Structure Of Cells
Idea #1: All living things are made of
Describe the main function of a cell:
1) Transport Molecules
2) Conservation of energy
Idea #2: The cells are the basic unit of life. Discovered through:
The fact that cells make everything up
Idea #3: Cells come from:
Describe the importance of maintaining Homeostasis:
Its important because our body is like a machine. Without homeostasis our body wouldn't know when to cool down and when to heat up
Pores in Cells
Describe the effects of surface area and pores on cells:
If pores are too small cells cant migraine towards the center. If their to large their area surface decreases.
Describe the main charateristic of a prokaryoric cell:
unicellular organism that lacks an organized nucleus or other membrane-bound organelle.
Eukaryotes have a nucleus
Functions of the cell membrne
- Allows certain materials to enter the cell
- Gets rid of cell waste.
- Contains all the cell organelles.
- Protects the cell from injury
Describe the bliayer structure of the cell membrane
The structure of the lipid bilayer explains its function as a barrier. Lipids are fats, like oil, that are insoluble in water. There are two important regions of a lipid that provide the structure of the lipid bilayer. Each lipid molecule contains a hydrophilic region, also called a polar head region, and a hydrophobic, or nonpolar tail region.
Fat derivatives in which one fatty acid has been replaced by a phosphate group and one of several nitrogen-containing molecules.
Describe the importance of cell membrane containing both polar and non polar parts:
The cell membrane is mostly composed of phospholipid molecules. Each of these has a polar head and a non-polar tail part. The polar bits are attracted to water,and the non-polar parts repel water.
Allowing certain substances to pass through it but not others, especially allowing the passage of a solvent but not of certain solutes.
Why must the cell membrane be semipermeable:
It allows important nutrients to enter the cell, while preventing other foreign or un-needed things to enter the cell.
Describe the direction of movement of the cell membranes parts
The direction of the water depends on the relative concetration of solutes on two sides of the membrane
Describe where a membrane protein is:
The lipid bilayer is not smooth because there are a variety of proteins attached to the surface and embedded in the membrane
What defines a plant?
a living organism of the kind exemplified by trees, shrubs, herbs, grasses, ferns, and mosses, typically growing in a permanent site, absorbing water and inorganic substances through its roots, and synthesizing nutrients in its leaves by photosynthesis using the green pigment chlorophyll.
Describe the structure and function of the vascular system of a plant:
The vascular system in plants have two components: xylem and pholem. The xylem helps in the transport of water absorbed through roots to all the aerial parts of the plant and the phloem helps in transporting the manufactured food from leaves to all other parts of the plant.
The xylem helps in the transport of water absorbed through roots to all the aerial parts of the plant
Phloem helps in transporting the manufactured food from leaves to all other parts of the plant.
Describe specialization in the cells of unicellular organism:
Their is no specialization in the cells because its only one cell as uni- means one. all jobs required for the cell are carried out in the same single cell
Describe specialization in the cells of multicellular orginisms:
Multicellular organisms are composed of many specialized cells. Specialized cells differ in structure (size, shape...) and function (the role they perform in the organism).
By Alex Aviles