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Biology > The Cell > Flashcards

Flashcards in The Cell Deck (34):
1

Compound Microscope

Uses two lenses: eyepiece and objective lens.

2

Eye piece lens

magnifies image

3

Nosepiece

rotates to move the desired lens into place

4

Objective Lens

magnifies the image

5

Stage/ Platform

supports the slide

6

Condensor

focuses light onto the slide.

7

Diaphragm

adjusts the amount of light reaching the slide.

8

Mirror

light source

9

Stage height adjustor

moves the stage up and down

10

Clip

holds slide in place

11

Fine Focus

for precise focussing

12

Coarse Focus

for rough focussing

13

protoplasm

all living parts of the cell

14

cytoplasm

all living material in a cell outside of the nucleus.

15

Cell sap

consists of salts, sugars and pigments.

16

Ultrastructure

the detail of a cell as seen through an electron microscope

17

Transmission Electron Microscope TEM

shows internal structure of specimen in great detail.

18

Scanning Electron Microscope

shows surface view of specimen.

19

Role of Vacuole

gives cell shape and structure. Stores materials eg. cell sap

20

Role of Cell Wall

protects plant, turgidity of plant, gives strength

21

Role of Cell Membrane

-retains cell contents
-Recognises materials that touch it.
-controls what enters and leaves the cell.
-gives some support to the cell.

22

Role of the nucleus

control centre of the cell

23

Chromatin

the name given to chromosomes when they are elongated and not dividing.

24

Role of Nuclear Pores

allows mRNA to pass in and out of nucleus.

25

Role of Nucleolus

makes ribosomes.

26

Role of Mitochondria

supplies energy to the cell.

27

Role of Chloroplats

green structures in plants in which photosynthesis takes place.

28

Role of Ribosomes

to make proteins

29

Prokaryotic cells

cells that do not have a nucleus or membrane-enclosed organelles.

30

Eukaryotic Cells

have a nucleus and organelles, all of which are enclosed by membranes.

31

Tissue

a group of similar cells that have been adapted to carry out the same function.

32

Tissue Culture

the growth of cells in a sterile environment in an artificial medium outside an organism.

33

Organs

a structure composed of a number of tissues that work together to carry out one or more functions.

34

Organ Systems

consists of a number of organs working together to carry out 1 or more functions.