Biology (Concepts & Connections) Ch 4
Terms
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What is this scientist known for?
Hooke - Hook: Coined the term "cells" and invented the microscope.
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What is this scientist known for?
van Leewenhoek - van Leewenhoek: 1st to see living cells. "All living things come from cells"
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What are these scientists known for?
Schwann and Scheilden -
Cell Theory
"All living things are composed of cells" -
What is this scientist known for?
Virchow - "All cells come from other cells"
- What are the 3 generalizations of the cell theory of 1850?
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1. All organism are composed of cells.
2. Smallest unit of life.
3. All cells arise from pre-existing cells. - Cells are small because of____________
- Diffusion
- The light microscope can magnify speciments___________
- 1000x
- The electron microscope can magnify specimens____________
- 100,000x
- All_____________ are prokaryotes.
- bacteria
- What 3 features are found in plants that are completely lacking in animal?
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1. cell walls
2. central vacuole
3. plastids - Name the 3 organelles that make up the cytomembrane system (start at the nucleus)
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1. endoplasmic reticulum (ER)
2. golgi body
3. nuclear membrane - The breakdown of the plasma or nuclear membrane would yield phospholipids and ____________.
- Protiens
- Name the organelle found in the nucleus.
- Nuclieolus (makes ribosomes)
- Name the organelle that produces proteins.
- Ribosomes
- Name the organelle that produces ribosomes.
- Nucleolus
- Name the organelle that produces lipids.
- SER
- Name the organelle that stores food, water, and ions.
- Vacuoles -- Vesicles
- Name the organelle that contains digestive enzymes.
- Lysosome
- What 2 organelles are thought to be ancient engulfled bacteria?
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1. chloroplasts
2. mitochondria - The cell's cytoskeleton are.
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1. To provide support and stucture.
2. cell movement (celia, flagella)
3. chromosome movement in cell division.
4. transmit impulses - Ceili's shape is___________ and it's internal structure is______________.
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short
microtubes 9+2 - Flagella's shape is______________and it's internal structure is_____________.
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long
microtubes 9+2 - Name the 4 cell junction.
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1. plasmodesmata (only in plants)
2. tight junction
3. gap junction
4. adhering junction