Cells

Question 0

What are prokaryotes?

Answer 0

Single celled organisms with no nucleus.

Question 1

What is the cell theory?

Answer 1

Cells are the basic unit of life, Every new cell forms from another cell, and every living thing is composed of cells.

Question 2

What are eukaryotes?

Answer 2

Cells with a nucleus and other structures formed around the membrane.

Question 3

Main function of the cytoplasm?

Answer 3

Where the organelles are placed

Question 4

What is the function of the cell membrane?

Answer 4

Supports cell, controls what goes in and out

Question 5

What is the main function of the nucleus?

Answer 5

Holds DNA and controls functions of the organelles.

Question 6

Main function of the Mitochondria?

Answer 6

Supplying cell with energy.

Question 7

Main function of endoplasmic reticulum

Answer 7

Transports materials throughout the cell.

Question 8

Main function of the golgi apparatus

Answer 8

Getting rid of waste

Question 9

Why do cells need to reproduce and not stay one big cell?

Answer 9

There is a time period in which cellular respiration etc occurs, and if it does not happen between that time period the cell will become poisoned. The cell has to be a particular size for this to happen.

Question 10

2 Organelles found only in the plant?

Answer 10

Cell wall, chloroplasts.

Question 11

3 Reasons cells divide?

Answer 11

Grow, repair and reproduce.

Question 12

what is diffusion? Explain

Answer 12

Chemicals going in the cell from an area of high concentration to low concentration.

Question 13

What is osmosis?

Answer 13

When liquid, usually water enters the cell from an area of low concentration into the higher concentration.

Question 14

3 stages for cell division?

Answer 14

interphase, mitosis, cytokenisis

Question 15

4 phases of mitosis in order?

Answer 15

Prophase, metaphase, anaphase, telophase

Question 16

What happens in the prophase stage?

Answer 16

Chromosomes can be seen, consists of 2 soster chromatids.

Question 17

What happens in the metaphase stage?

Answer 17

The chromosomes meet in the middle of the cell, the membrane seems to have completley gone.

Question 18

What happens in the anaphase stage?

Answer 18

Centrometre splits and the now daughter chromosomes move to opposite sides of the cell.

Question 19

Telophase stage?

Answer 19

nucleur membrane seems to form around each group of daughter chromosomes.

Question 20

What happens in the cytokenisis phase?

Answer 20

Cell pinches in the middle and seperates into 2 different cells, DNA is exactly the same in both.

Question 21

What controls movement of chromosomes during mitosis?

Answer 21

Spindle fibers.

Question 22

what is a tumour?

Answer 22

mass of cells that divide uncontrollably.

Question 23

What is a benign tumour?

Answer 23

Mass of cells that do not break off and affect its surroundings.

Question 24

What is a malignant tumour?

Answer 24

Mass of cancerous cells that break off and travel to different parts of your body.

Question 25

What does metasis mean?

Answer 25

Cancerous cells breaking off and travelling to different parts of the body.

Question 26

What are carcinogens? Examples.

Answer 26

Environmental factors that can cause cancer, examples are UV light, radiation and tobacco smoke.

Question 27

Goblet cells main function?

Answer 27

Move around with cilia excreting mucus from lungs and preventing dirt.

Question 28

Red blood cells

Answer 28

Contain hemoglobin carries oxygen to blood

Question 29

Main function of bone cells

Answer 29

Build on themselves, absorb calcium from nutrients, protect internal organs

Question 30

Main function of nerve cells?

Answer 30

Long branches with electrical impulses that tell the body what to do.

Question 31

Main function of muscular cells?

Answer 31

Muscle fibers shorten making muscle cells contract which causes the body to move.

Question 32

Main function of skin cells?

Answer 32

Layer ontop of eachother to protect inner & reduce water loss.