M1 Ch 3-3.1: Microscope

Question 1

Microscope

Answer 1

Instrument that magnifies an object

tenses change orientation of image (inverted)

Question 2

Light microscope

Answer 2

visible light passes through and bent by lens to see specimen
used for living organisms but requires staining which kills cells

Question 3

Magnification

Answer 3

degree of enlargement of an object

Question 4

Resolving Power

Answer 4

ability of microscope to allow it to distinguish two adjacent structures and separate
(higher resolution=closer they can be , better clarity and detail)

Question 5

Dissecting microscope

Answer 5

low magnification
thick objects can be examined
use for tissue
view correct image (not inverted)

Question 6

Electron microscope

Answer 6

use beam of electrons =increase magnification and resolving power
cannot be used for life cells -works best in vacuum, preparation kills cells

Question 7

Scanning

Answer 7

Cells coated in metal (gold) and beam moved back and forth across cell surface

Question 8

Transmission

Answer 8

Beam transmitted through cell
details on internal structures
more bulky and expensive

Question 9

Unified Cell theory

Answer 9

states all living things composed of one or more cells, that cell is basic unit of life and all new cells arise from existing cells