Cells and Systems 1.1 -1 .3 Flashcards
(38 cards)
1
Q
Compound Light Microscope
A
- Light passes through the specimen
- Lenses enlarge or magnify the image
- Micrometers as units
- Image is always upside down and backwards in the microscope
2
Q
Electron Microscope
A
- Uses a beam of electrons
- Higher resolving power than a light microscope
- Can magnify up to 100, 000 times
3
Q
Transmission Electron microscope (TEM)
A
- Used to explore the internal strucutre of a cell
4
Q
Transmission Electron microscope (TEM)
A
- Used to explore the internal structure of a cell
5
Q
Scanning Electron microscope (SEM)
A
- Used to study the detailed architecture of the surface of a cell
6
Q
Eye Piece / Ocular lens
A
- Part you look through
- Can magnify 10 times
7
Q
Body Tube
A
- Part that holds the eyepiece and the lens a proper working distance form one another
8
Q
Revolving nosepiece
A
- Rotates to switch between objective lenses
9
Q
Objective Lens
A
- A set of 3 lenses that magnify the object to either 4, 10, or 40 times the magnification.
10
Q
Coarse Adjustment knob
A
- Moves the stage in large movements
11
Q
Fine Adjustment knob
A
- Brings the object into focus using small movements
12
Q
Arm
A
- Connects the base with the tube
13
Q
Stage
A
- Holds the microscope slide
14
Q
Condenser Lens(Diaphragm)
A
- A lens located with or below the stage to gather light coming from the light source and concentrate it at the specimen
15
Q
Stage Clip
A
- Holds the slide together
16
Q
Light Source
A
- Provides the light
17
Q
Diaphagm
A
- Controls the amount of light that reaches the object to be viewed
18
Q
Base
A
- Used to support the light source
19
Q
Magnify
A
- Increase the apparent size of a specimen
- Ocular lens x objective lens = magnification
20
Q
Micrometer (μm)
A
- Same as 0.001 mm
21
Q
F.O.V. (Field of View)
A
- The diameter of the circular region of the slide visible under the microscope
22
Q
Resolving power
A
- The ability of an optical instrument to show two objects as seperate
23
Q
Multicellular
A
- An organism with more than 1 cell
24
Q
Unicellular
A
- An organism with a single cell
25
Levels of Organisation
- Arrangement of organisms from simplest to the most complex
26
Cell
- Smallest unit of life that can perform the functions of life
27
Tissues
- Groups of cells that do the same job
28
Organs
- Tissues are grouped into organs
29
Systems
- Organs are grouped into systems
30
Organelle
- Structures in the cell
31
Nucleus
- In a cell, an organelle controls all the cell's activities
32
Cytoplasm
- Gel-like substance within the cell membrane that contains and supports the structures of the cell
33
Mitochondria
- Generates most of the chemical energy needed to power the cell's chemical reactions
34
Cell Membrane
- Selectively permeable structure enclosing the contents of a cell or organelle
- Regulates the passage of substance into and out of a cell or organelle
35
Vacuole
- A fluid-filled organelle that stores food, wastes, water and other materials in a cell
35
Vacuole
- A fluid-filled organelle that stores food, wastes, water and other materials in a cell
36
Chloroplast
- An organelle that contains chlorophyll and enables plants to make carbon hydrates through photosynthesis
37
Cell Wall
- Rigid structures that surround the cell membrane to protect and support the cell
