Cells Flashcards Preview

Science > Cells > Flashcards

Flashcards in Cells Deck (21):
0

How do you prepare a specimen for a light microscope.

Use the pipette to drop a pond of water onto the microscope slide

Gently place a coverslip over the water.

1

Why are stains used in the preparation of microscope slides.

Many objects are colourless when viewed under the microscope so specimens are often stained so that
they are easier to see.

2

Explain the significance of the microscope invention

The microscope invention opened up a whole new world with new scientific languages and classifications.

3

Name three scientists to our understanding of cells

Robert Hooke , rudolf Virchow, Theodor Schwann

4

Name different types of cells and their function

Plant cell- contain the cell membrane, nucleus cytosol, cell wall, chloroplasts, vacuole
Animal cell- cell membrane, nucleus, cytosol

5

What is unicellular

Describes an organism having only one cell

6

What is multicellular

Having many cells most plants and animals are multicellular.

7

Why are cells different shapes.

The size of the cell will vary between organisms and within a multicellular organism

8

When and who discovered the microscope

Robert Hooke the 17th century

9

What are the different units of measurement

Millimetres
Micrometers
Nanometers

10

How to focus the specimen

By using the eyepiece lens and the objective lens

11

What are the magnifications

40
100
400

12

What do cells contain

Organelles

13

How do the organelles help the cell

Have particular jobs within the cell and function together to keep the organism alive

14

What are prokaryotes

The Kingdom of organisms that consist of single cells with a nucleus not surrounded by a membrane or a cell wall commonly called bacteria

15

What are eukaryotes

Member of the group of organisms that has a membrane around the nucleus in each of their cells

16

What are the five kingdoms

Animalia plantae fungi protoctista prokaryote

17

Name the body cells

Red blood cells
Muscle cell
Nerve cell
Bone cell
Lung epithelial cells
Adipose tissue cells
Skin cells
Sperm cells
Egg cells

18

Name the plant cells

Guard cells
Xylem cells
Root hair cells
Leaf cells
Epidermal cells
Phloem cells

19

What did rudolf Virchow do and when

That all cells arise from cells that already exist in 1858

20

When and what did Theodor Schwann do

All animals are made up of one or more cells and that cells is a unit of living things