Exam 1 9/13 Howard Intro to Histology Flashcards
Another name for histology
Microanatomy
Methods for viewing tissue
Conventional Light Microscopy
Confocal light microscopy
Transmission Electron microscopy
Scanning electron microscopy
X-ray
Computer Axial Tomography
Magnetic resonance imaging
Positron emission tomography
Which method of viewing tissue will we normally see/sometimes see?
Conventional light microscopy; transmission electron microscopy
True or false: confocal microscope has only one lens
False - more than a single lens
What magnifications are possible with a compound light microsope?
40, 100, 400, 1000x
True or false: electron microscopes can provide a 2D and 3D image
True
Transmission electron microscope provides what kind of image?
2D
Scanning electron microscope provides what kind of image?
3D
True or false: you cannot see small molecules with an electron microscope
False - can see up to 1nm which is the size of some small molecules, like glucose
Approximate size of cell nucleus
1-10 micrometers
Resolution of light microscope
200 nm
When viewing artifacts, what is your ruler?
identify different cells and nucleus as a reference point
What affects the appearance of artifacts?
- Preservation/fixation
- embedding
- sectioning
- staining
What is usually used in fixation of a specimen?
37% buffered formaldehyde
What is usually used to embed a specimen?
Paraffin wax
What is usually used to stain a specimen?
H&E (hemotoxylin and eosin)
True or false: when preserving a specimen, they are hydrated, dehydrated, then rehydrated again
False - first dehydrated, rehydrated, then dehydrated to apply stain