Questions With Answers Correct
d function
2. The eight specialized cellular functions are: movement, conductivity, metabolic absorption,
secretion, excretion, respiration, reproduction, communication
3. Eukaryotic cells: Contain a nucleus and other organelles that are bound by membran es.
4. The eukaryotic cell consists of three general components: plasma membrane, cyto-
plasm, and intracellular organelles
5. Nucleus: A part of the cell containing DNA and RNA and responsible for growth and reproduction
6. Vaults: cytoplasmic organelles that are carrying messengers of ribonucleic acid (mRNA) from the nucleus to the
ribosomal sites of protein synthesis
7. plasma membrane (cell membrane): It's function is to protect the cell and control what goes in
and out. It is not a solid structure. It is made of millions of smaller molecules so it is flexible and porous (allows things
to pass through it).
8. cellular receptors: protein molecules on the plasma membrane, in the cytoplasm, or in the nucleus that can
recognize and bind with specific smaller molecules called ligands
9. Ligands: A molecule that binds specifically to a receptor site of another molecule.
10. Cells are held together by three different means:: (1) the extracellular membrane, (2) cell
adhesion molecules in the cell's plasma membrane, and (3) specialized cell junctions.
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, 11. Cells communicate in three main ways: (1) they form protein channels (gap junctions); (2)
they display receptors that attect intracellular processes or other cells in direct physical
contact; and (3) they use receptor proteins inside the target cell.
12. reception: The target cell's detection of a signal molecule coming from outside the cell.
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