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Cell contents are separated from the external environment by the cell membrane. Cells are also separated by the external environment when they are in the bloodstream in the capillaries and veins.
Leland Grant
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What tissues have cells that are in direct contact with the external environment?
Epithelial tissues.
How the contents of a cell are protected from the cell's environment?
Most cells are to small to be seen with the naked eye.some organisms are made up of trillions of cells
What is the effects of the exchange of oxygen and carbon dioxide between internal leaf cells and the external environment?
the surface of these cells are moist and the stomatas are open
Into what two groups can cells be separated?
Cells can be separated into prokaryotic and eukaryotic cells.
What provides a boundary between the internal and external environment of all cells?
The cell membrane surrounds a cell's cytoplasm. It protects the cells by being selective about what enters and exists a cell.
What separates cells contents from the cells environment?
The tin can
What protective barrier separates cells contents from the cells environment?
A cell membrane, or cell wall.
What cells would be described as flat cells that provide a barrier to the external environment?
Skin cells.
Why do plant cells have cell wall?
It gives a structure and protects the inner cells from the external environment.
Why do plant cells have cell plants?
It gives a structure and protects the inner cells from the external environment.
Do cells break down molecules?
Maintaining a stable external environment
What tissues have cells that are in direct contact with the external environment?
Epithelial tissues.
Which process is not a way in which cells maintain homeostasis?
Changing their external environment
What is a type of active transport?
There are three types of active transport. They are endocytosis, exocytosis, and sodium potassium pump. Endocytosis is when the cells ingest substances. Exocytosis is the process of releasing contents of the cell to the external environment.
What is function of a protein in a cell?
It sends signals between the cells external and internal environment.
How the contents of a cell are protected from the cell's environment?
Most cells are to small to be seen with the naked eye.some organisms are made up of trillions of cells
Why do plants cell have cell wall?
It gives a structure and protects the inner cells from the external environment.
