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16 Cards in this Set
- Front
- Back
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how do you convert millimeters into micrometers? |
x 1000 |
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give an example of a Eukaryotic Cell |
animal cell, plant cell, fungi cell or protista cell |
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talk about Prokaryotic Cells |
Prokaryotes are bacterial cells which have no nuclei but instead have plasmids and genetic material where there DNA is found. They have flagellum to allow them to move. |
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what is Resolution?
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resolution is the minimum distance apart that two objects can be and still appear as seperate items |
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what is Magnification? |
magnification is how many times bigger an image is when compared to the actual object |
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talk about Electron Microscopes |
- have greater magnification than Light Microscopes - allows us to see inside the cell in greater detail |
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miscroscopy units: 1 centimeter = ? 1millimeter = ? 1micrometer = ? |
1 centimeter = 10millimeters 1millimeter = 1000micrometers (μm) 1micrometer = 1000 nanometers (nm) |
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what does the triangle I A M stand for? |
I - image (not actual size, picture size - size after magnification) A - actual size (size without any magnification) M - magnification (how many times bigger you have made it) |
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what are specialised cells? |
cells that are specialised to carry out particular jobs |
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what is a nerve cell specialised to do? |
a nerve cell is specialised to carry electrical impulses from one part of the body to another |
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what are a nerve cell's adaptations? |
-lots of dendrites to make connections to other nerve cells -an axon which carries the nerve impulse from one place to another. can be very long. -nerve endings or synapses are adapted to pass impulses to another cell or between a nerve cell and a muscle in the body using special transmitter chemicals. contain lots of mitochondria to provide energy needed to make the transmitter chemicals |
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what is a muscle cell specialised to do? |
a strained muscle cell is specialised to contract and relax |
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what are a strained muscle cell's adaptations? |
-contain special proteins that slide over each other making the fibres contract -contain many mitochondria to transfer the energy needed for the chemical reactions that take place as the cells contract and relax -can store glycogen, a chemical that can be broken down and used in cellular respiration by the mitochondria to transfer the energy needed for the fibres to contract |
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what is a sperm cell specialised to do? |
sperm cells are specialised to get the male DNA to the female DNA in reproduction |
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what are a sperm cell's adaptations? |
-a long tail which whips from side to side to help move the sperm through water of the female reproductive system -the middle section is full of mitochondria which transfer the energy needed for the tail to work -the acrosome stores digestive enxymes for breaking down the outer layers of the egg -a large nucleus contrains the genetic information to be passed on |
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how do you draw a scale bar? |
1. measure the actual length of the cell 2. convert into μm (if needed) 3. scale bar length = drawn length of cell 4. (μm) x 500 ÷ actual length |
