Practical Modules 1-3 Flashcards
1
Q
Primary Literature
A
- The original publication of peer-reviewed research
- Usually written by scientists who carried out the research
2
Q
Secondary Source
A
- Another person’s interpretation of primary research
- Ex: critiques, summarizations of the findings in a review, or a report of said advances in an article
3
Q
Scientific Hypothesis
A
- A causal explanation of a natural phenomenon
- Testable: can be tested, not hypothesis if it cannot be tested
- Falsifiable: If not always true, can be proven false
4
Q
Independent Variable and Dependent Variable
A
- IV: Variables not changed by other variables
- DV: Manipulated or measured between control and experimental group
- Ex: Height= IV, Jumping distance= DV
5
Q
Eukaryotic Cell
A
- Have membrane-enclosed organelles
- Nucleus
- Both have plasma membrane and genetic material
6
Q
Prokaryotic Cell
A
- Do not have membrane-enclosed organelles
- No nucleus, has DNA though
- Replicate as quickly as they can
7
Q
What are the two main fibers found in the extracellular matrix of areolar connective tissue? What are their functions?
A
- Collagen fibers (large white fibers)
- Elastic fibers (smaller, dark fibers)
- Create stretch
- Both make up the extracellular matrix
8
Q
Cytoplasmic Streaming
A
- The moving of chloroplasts in a plant cell in response to light
- Acess to light= photosynthesis (create energy and O2
- Chloroplasts moved in elodea leaf
9
Q
Ocular Lens
A
- Nearest to your eye when you are looking through the microscope at a specimen
- 1 ocular= monocular, 2=binocular
- Can be adjusted using interpupillary adjustment (pulling them apart or pushing them together)
- 10X magnification
- Pointer= black line that points at specimen
10
Q
Objective Lens
A
- Closest to the specimen
- 3 or 4 arranged on a rotating nose piece
- Rotating leads to different lens of diff magnification on specimen
- 4x. 10x, 43x, 100x
- Total mag= ocular x objective magnification
11
Q
Body Tube
A
- Part of microscope between oculars and objectives
- Light travels through specimen, through objectives, through tube, and to your eyes through ocular lens
12
Q
Mechanical stage
A
- the platform on which the slide is placed
- Moved by means of two small knobs under the stage
- One moves it left and right, the other moves it up and down
13
Q
Substage
A
- Area under the stage
- Iris diaphragm: opens and closes like an eye to regulate amount of light that hits specimen (move level back and forth)
- Condenser: Focuses light by a knob that moves it up and down
14
Q
Base
A
- The bottom of the microscope that sits on table
- Holds the illuminator (light source)
- Intensity can be changed using dial on the left side of base (1-10)–> set at 1 before turning it on
15
Q
Arm
A
- Connects the body tube to the stage and bade
- Focusing knobs:
- Larger: coarse focus– find specimen
- Smaller: fine focus–bring object into focus
- At greater than 10x objective, always use fine focus instead of coarse (don’t want to hit slide)
- Move out of mag if can’t find it and use coarse
16
Q
Field of view and depth of field
A
- Field of view: Horizontal plane visible at certain magnification
- Depth of field: Vertical direction in focus at one time
- As magnification becomes higher, field of view and depth of view decrease
