Chpt 3 The Cell

Question 1

Describe cell membrane

Answer 1

• cell membrane is a skin that surrounds + protects the cell.
• It controls what enters and leaves the cell

Question 2

Describe cytoplasm

Answer 2

• cytoplasm is a watery substance containing dissolved substances ie. proteins + sugars.
• Its where the chemical reactions neccessary for life take place

Question 3

Describe the nucleus

Answer 3

• control centre of the cell
• contains DNA
• controls chemicals the cell will make
• involved in how cell divides to make more cells

Question 4

Describe the cell structure of an animal cell

Answer 4

• cell membrane
• cytoplasm
• nucleus

Question 5

Describe the structure of a plant cell

Answer 5

• cell wall
• nucleus
• vacuole
• chloroplast
• cell membrane
• cytoplasm

Question 6

Describe the cell wall

Answer 6

• outside the membrane

- gives shape and support

Question 7

Describe chloroplasts

Answer 7

-hold chlorophyll -> green colour that plants use to make food

Question 8

Describe a vacuole

Answer 8

• large in plant cells
• spaces in cytoplasm
• store things + give support

Question 9

Look at page 11 and 12

Answer 9

For cell diagrams

Question 10

By how much does the eyepiece lens magnify?

Answer 10

x10

Question 11

By how much do the three objective lenses magnify?

Answer 11

• low power x4
• medium power x10
• high power x40

Question 12

At does the nosepiece do?

Answer 12

Holds the objective lenses

Question 13

Wha does the coarse focus wheel do?

Answer 13

Rings the object into rough focus

Question 14

What does the fine focus wheel do?

Answer 14

Brings the object into sharp focus

Question 15

What does the stage do?

Answer 15

It holds the slide

Question 16

Look at page 13

Answer 16

For experiment on cells

Question 17

What is used to see a plant cell more clearly?

Answer 17

Iodine stain

Question 18

What is a tissue?

Answer 18

A group of similar cells with the same function

Question 19

Give one example of a plant and animal cell

Answer 19

Transport tissue and muscle tissue

Question 20

What is an organ?

Answer 20

Its many different tissues working together

Question 21

Give one example of a plant and human organ

Answer 21

The leaf and the heart

Question 22

What is a system?

Answer 22

A group of organs working together

Question 23

Give on example of a plant and human system

Answer 23

The shoot system and the circulatory system

Question 24

What are the differences between plant and animal cells?

Answer 24

Plant: -nucleus Animal cell:-nucleus

        - cell wall                                               -no cell wall
        - cytoplasm                                          -Cytoplasm
        - cell membrane                                 -membrane
        - chloroplasts                                      -no chloroplasts
        - large vacuole                                    -no large vacuole