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Flashcards in Cells Deck (33)
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1

What are the three parts of cell theory?

1) all organisms are composed of one or more cells
2) the cell is the basic unit of structure and organisation in organisms
3) Cells come from pre-existing cells

2

Outline the contributions the scientists have had to cell theory

Zacharias Jansen- invented the first compact microscope
Robert Hooke- discovered cells
Anton Van Leeuwenhoek- first person to observe and describe microscopic living things
Robert Brown- describes and discovered the nucleus
Schleidien & schuwaan- started the development of cell theory
Vichow- completes the cell theory

3

Identify the parts of a microscope

Ocular lens
Adjustment knob
Base
Arm
stage clip
Lamp/mirror
Objective lens
Stage

4

Identify and describe the function of nucleus

Control centre of the cell that is surrounded by a nuclear membrane. It contains DNA that control the cells activities

5

Describe the function of Mitichondria

The site for the process of cellular respiration and energy production

6

Describe the function of Chloroplasts

The site for the process of photosynthesis

7

Describe the functions of Vacuole

Storage areas that contain air, water, waste and food particles

8

Describe the function of Cytoplasm

Thick solution that fills the cell including all the material inside the cell and outside the nucleus

9

Describe the functions of the Cell membrane

Thin layer that surrounds the cytoplasm enclosing the cell and regulates what substances enter and exit the cell

10

Describe the functions of the cell wall

Tough, rigid layer surrounding the cell membrane . It is made of cellulose providing strength, structural support and protection to the cell

11

Describe the difference between plant and animal cells in terms of organelles

Plants cells have a cell wall, chloroplast and large vacuole and animal cells have small vacuoles

12

Identify the source of energy for animals

The food they eat

13

What is the source of energy for plants

Photosynthesis

14

Outline the difference between mitosis and meiosis

Well mitosis is a cellular division necessary for the growth and repair of cells while meiosis is a cellular division necessary for the production of sex cells (gametes) for reproduction

15

Define the term unicellular organism and list examples

A unicellular organism is an organism made up of only one single cell. For example-
-bacteria
-virus
-Amoeba
-Paramecium
-Euglena

16

Define the term multicellular organism and list examples

A multicellular organism is an organism made up of more than one cell and many different types of cells. For example
-plants
-humans
-dog
-fish
-kookaburra
-elephant

17

Define the term specialised Cells

Specialised Cells have specific functions, different shapes, structures and sizes to make them better able to do their job

18

Outline how the specific structure of nerve cells helps support their function

Nerve cells are long with star shaped fibres at one end, the length helps to detect and send electrical impulses through the body at speed

19

I know your freaking out

But it’ll be ok, just keep going!
AND EAT! Can’t focus on an empty stomach!

20

Outline how the specific structure of the skin cell helps support its function

A skin cell has a flattened shape, the flat shape helps to cover and protect your body

21

Outline how the specific structure of the sperm cell helps support its function

Sperm cells have long tails, the tail helps the sperm cell to swim towards egg cells

22

Outline how the specific structure of the muscle cell helps to support its function

Muscle cells are long, thin and elastic, long thin cells can slide over each other to allow movement and elasticity allows muscle to expand and contract, also helping with movement

23

Outline how the specific structure of the red blood cell helps to support its function

RBC’s are small with a round disc shape, it’s small size helps to move through blood vessels easily

24

Outline how the specific structure of the ova helps to support its function

An ova is large and round, the large size helps them to store plenty of nutrients (food)

25

Outline how the specific structure of the bone helps to support its functions

Bones are surrounded by calcium, the calcium helps to ensure that the bones are strong

26

Define cell

The smallest structural and functional unit of an organism which consists of cytoplasm and a nucleus enclosed in a membrane

27

Define chloroplast

Chloroplasts are small organelles inside the cells of plants and algae

28

Define chromosome

Chromosomes are made upon DNA that contain all the genetic information for an organism. They are found within the nucleus of a cell

29

Define division

Cell division is the process of replicating and transferring genetic material to new cells

30

Define Gamete

A gamete is the male or female reproductive cell