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| Schedien and Schwann made what claim? |
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Definition
| The cell is the building block of all organisms |
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Term
| Rudolph Birchow also claimed that |
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Definition
| cells come from pre-existing cells |
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Term
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Definition
aka Primitive cells
do not contain a nucleus or many cell organelles, other than ribosomes
lacks internal membranes
In the Kingdom, Monera |
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Term
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Definition
aka Complex Cells
have a nucleus and many organelles
contains internal membranes
each organelle carries out a certain function |
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Term
| why do Prokatyotic cells are considered to be less efficient than Eukaryotic cells? |
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Definition
| the chemical reactions occur all over the cytoplasm rather than in areas of specialization |
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Term
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Definition
surrounded by a double- layers
membrane has pores through which larger molecules pass
control centre for the cells's functions
contains a fluid called the cucleoplam
conatins chromatin whch is DNA strands which forms chromosomes during cell division |
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Term
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Definition
Dark region in the Nucleoplasm
one or more found in the nucleus
where ribosomal RNA is produced or stored
involved in interactions between the nucleus and the cytoplasm |
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Term
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Definition
the hereditary material of the cell
condenses to form chromosomes during cell division
composed of protein and DNA |
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Term
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Definition
rod-shaped bodies in the nucleus, particularly during cell division
contains the hereditary information
condensed chromatin |
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Term
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Definition
-a coloidal substance that can change from the gel(solid) to the sol (liquid) state with the addition of heat or change in metabolic activity.
-contains and supports all the cell organelles |
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Term
| Cell membrane or plasma membrane |
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Definition
-composed of protein and phospholipids
-acts as a selectively permeable membrane
-to allow movement of materials in and out of the cell
- |
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Term
| smooth endoplasmic reticulum |
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Definition
-system of interconnected flattened tubes, sacs or canals.
-begins at the nuclear envelope and branches throughout the cytoplasm to the cell membrane
-moves molecules from one area to another.
-location of lipic maufacture. Cells that produe steroid hormones have abundant smooth ER
-Section of both types of ER can break free "blebbing" to produce small membrane bound sacs of either proteins or lipids called vesicles
-contains enzymes that synthesize lipids and related products such as steroids
-also seems to have other enzymes in the smooth ER of the liver that help detoxify drugs and poisons. |
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