Chapter 7 Flashcards

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1
Q

How do you calculate total magnification

A

Ocular power x Objective power

(10x ocular lens, 4x objective lens) 10 x 4 = 40

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2
Q

How to calculate current FOV

A

(Original Magnification ÷ New magnification) x Original FOV

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3
Q

how is FOV determined

A

using a ruler or grid

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4
Q

how to calculate object size

A

( dFOV in mm ÷ number of time cell spans FOV )

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5
Q

convert metres to centimetres

A

÷ 100

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6
Q

convert centimetres to millimetres

A

÷ 10

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7
Q

convert millimetres to micrometres

A

x 1000

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8
Q

convert micrometres to nanometres

A

x 1000

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9
Q

advantages and disadvantages of the light microscope

A

+ Cheap, Small, Coloured images

- Less resolution and magnification

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10
Q

advantages and disadvantages of the electron microscope

A

+ Better quality, increase magnification

- Expensive, Black and white images, Large

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11
Q

what can the light microscope view

A

hair, Red Blood Cells, Bacteria, Some viruses

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12
Q

what can the electron microscope view

A

everything a light microscope can plus DNA molecules, Glucose molecules and atoms

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13
Q

how does a light microscope work

A

Light is transmitted through two lenses

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14
Q

how does an electron microscope work

A

Uses electron beam instead of light

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15
Q

define cytoplasm

A

Thick fluid within the cell membrane and all the structures suspended in it

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16
Q

define cytosol

A

The liquid part of the cytoplasm (75-90% water). Contains highly organised fluid material with dissolved substances

17
Q

define organelle

A

Specialised structure inside the cell that has a specific function

18
Q

what organelles are unique to plant cells

A
  • Cell wall
  • Chloroplasts
  • Large vacuoles
19
Q

what organelles are unique to animal cells

A
  • Centrioles
  • Cilia or flagella (tail)
  • Small vacuoles
20
Q

name 5 organelles present in both plant and animal cells

A
  • Plasma membrane
  • Endoplasmic Reticulum
  • Mitochondria
  • Nucleus
  • Golgi body
21
Q

Drawing magnification

A

drawing size ÷ actual size of object