GNHISD1
🇬🇧
In Inglés
In Inglés
Practique preguntas conocidas
Manténgase al día con sus preguntas pendientes
Completa 5 preguntas para habilitar la práctica
Exámenes
Examen: pon a prueba tus habilidades
Pon a prueba tus habilidades en el modo de examen
Aprenda nuevas preguntas
Popular en este curso
Aprende con fichas
Modos dinámicos
InteligenteMezcla inteligente de todos los modos
PersonalizadoUtilice la configuración para ponderar los modos dinámicos
Modo manual [beta]
Seleccione sus propios tipos de preguntas y respuestas
Otros modos disponibles
Completa la oración
Escuchar y deletrearOrtografía: escribe lo que escuchas
elección múltipleModo de elección múltiple
Expresión oralResponde con voz
Expresión oral y comprensión auditivaPractica la pronunciación
EscrituraModo de solo escritura
GNHISD1 - Marcador
GNHISD1 - Detalles
Niveles:
Preguntas:
226 preguntas
🇬🇧 | 🇬🇧 |
In a routine histology department, virtually all of the work is done using a/an __________________ | Light microscope |
To examine cells at a very high magnification, it is necessary to use a/an ____________ | Electron microscope |
Term used to denote photographs of images taken using a microscope | Photomicrograph /Micrograph |
Label parts | Answer |
The microscope consists of 2 sets of lenses: ____________ & __________ | Ocular lens (eyepiece) Objective lenses (3-4) |
Powers of the eyepiece (10x) multiplied by objective lenses determine | Total Magnification |
Refers to bending | Refraction |
Identify resolution status | Fully resolved |
Identify resolution status | Just resolved |
Identify resolution status | Unresolved |
Number that expresses the ability of a lens to resolve fine details in an object being observed | Numerical Aperture |
Distance from a lens center to a point where parallel rays are focused on the optical axis | Focal length |
Effective magnification of a microscope is the product of magnification produced by the ___________ & __________ | Objective and the eyepiece |
Type of light microscope: light source is below the section & objective above it | Conventional arrangement |
Type of light microscope: light source is above the section & objective beneath it | Inverted microscope |
Limitations of a microscope is determined by _________ & __________ | Wavelength of light being used (λ) & properties of the optical components (An) |
Limit of resolution formula | D = (λ/2) x An |
Technique that is particularly useful for viewing unstained cells; most often used for observing live cells in vitro. | Phase contrast microscopy |
Converts differences in the phase of the light passing through the cell into differences in amplitude, so that some subcellular detail, including the nuclei, are visible | Phase contrast microscopy |
Additional elements are required to convert a bright field microscope into a phase contrast microscope | Condenser annulus & phase plate |
Additional elements are required to convert a bright field microscope into a phase contrast microscope: allows a ring of light to illuminate the section | Condenser annulus |
Valuable for viewing live cells that have been labelled with fluorescent markers | FLUORESCENCE MICROSCOPES |
Used in a technique analogous to immunohistochemistry, called immunofluorescence | FLUORESCENCE MICROSCOPES |
TYPES OF MICROSCOPY: consists of a light source | Brightfield Microscopy |
TYPES OF MICROSCOPY: condenser used to focus light on the specimen | Brightfield Microscopy |
TYPES OF MICROSCOPY: total magnification = objective X ocular lens | Brightfield Microscopy |
TYPES OF MICROSCOPY: limitation: resolution of the image | Brightfield Microscopy |
TYPES OF MICROSCOPY: same objective and ocular lenses used in brightfield | Darkfield Microscopy |
TYPES OF MICROSCOPY: special condenser (filter) used to prevent transmitted light from directly illuminating the specimen | Darkfield Microscopy |
TYPES OF MICROSCOPY: advantage: resolving power is significantly improved (0.02 um) | Darkfield Microscopy |
TYPES OF MICROSCOPY: disadvantage: internal structure cannot be studied; only morphology | Darkfield Microscopy |
TYPES OF MICROSCOPY: advantage: microorganisms (Treponema, Spirillum, Leptrospira) that cannot be normally stained by conventional methods | Darkfield Microscopy |
TYPES OF MICROSCOPY: enables internal details to be examined | Phase Contrast Microscopy |
TYPES OF MICROSCOPY: disadvantage: internal structure cannot be studied | Phase Contrast Microscopy |
TYPES OF MICROSCOPY: the differences in phase are amplified so that in-phase light appears brighter than out of phase light | Phase Contrast Microscopy |
TYPES OF MICROSCOPY: used on Live, unstained organisms, cell parts such as mitochondria | Phase Contrast Microscopy |
TYPES OF MICROSCOPY: uses fluorochromes | Fluorescent Microscopy |
TYPES OF MICROSCOPY: involves staining organisms with fluorescent dyes | Fluorescent Microscopy |
TYPES OF MICROSCOPY: organisms / specimens appear brightly illuminated against a black background | Fluorescent Microscopy |
TYPES OF MICROSCOPY: uses magnetic coils to direct a beam of electrons from a tungsten filament through a specimen onto a screen | Electron Microscopy |
TYPES OF MICROSCOPY: instead of lenses, uses palladium, gold | Electron Microscopy |
TYPES OF ELECTRON MICROSCOPE:uses ultrathin slices of microorganisms or viruses | TRANSMISSION ELECTRON MICROSCOPE (TEM) |
TYPES OF ELECTRON MICROSCOPE: electrons like light pass directly through the specimen | TRANSMISSION ELECTRON MICROSCOPE (TEM) |
TYPES OF ELECTRON MICROSCOPE: electrons bounce off the surface of specimen at an angle | SCANNING ELECTRON MICROSCOPE (SEM) |
TYPES OF ELECTRON MICROSCOPE: 3D picture is produced | SCANNING ELECTRON MICROSCOPE (SEM) |
Identify the type of microscope used: | Brightfield Microscopy |
Identify the type of microscope used: | Darkfield Microscopy |
Identify the type of microsc | Phase Contrast Microscopy |
Identify the type of microscope used: | Fluorescent microscope |
Procedures employed in specimens before they are viewed under the microscope; preparation of the tissues | Histochemical techniques |
FNA is usually recommended to tissue for | Breasts, lymph nodes, thyroid, testicles |
Combines the techniques of biochemistry and histology in the study of the chemical constitution of cells and tissues. | Histochemistry |
Histochemical stain: What is used in the great majority of routine histology | Haematoxylin and eosin (H&E) |
Histochemical stain: quick, cheap and informative | Haematoxylin and eosin (H&E) |
Gram stain color: staphylococci, streptococci and pneumococci | Deep blue (Gram positive) |