Cells, Organs And Tissues

Question 1

What is a tissue?

Answer 1

Group of particular cells working together to perform a certain function.

Question 2

What is an organ?

Answer 2

A group of tissues working together to perform a particular function.

Question 3

What is an organ system?

Answer 3

A group of organs working together to perform a particular function.

Question 4

What features does an animal cell have?

Answer 4

Cell membrane
Nucleus
Cytoplasm

Question 5

What features does a plant cell have?

Answer 5

Cell membrane
Nucleus
Chloroplasts
Cytoplasm
Cell wall

Question 6

What features does a bacterial cell have?

Answer 6

Cell membrane
Plasmids
Cell wall
Cytoplasm

Question 7

What features does a yeast cell have?

Answer 7

Cell membrane
Nucleus
Cell wall
Cytoplasm

Question 8

What is the function of a nucleus?

Answer 8

It controls the activities of the cell

Question 9

What is the function of cytoplasm?

Answer 9

It is a liquid gel where most of the chemical reactions needed for life take place

Question 10

What is the function of a cell membrane?

Answer 10

It controls the passage of substances in and out of the cell

Question 11

What is the function of mitochondria?

Answer 11

Substances in cytoplasm where oxygen is used and most of the energy during respiration is released

Question 12

What is the function of ribosomes?

Answer 12

Where protein synthesis takes place

Question 13

What is the function of a cell wall?

Answer 13

Made of cellulose which strengthens and supports the cell

Question 14

What is the function of chloroplast?

Answer 14

Contains chlorophyll

Question 15

What is the function of a permanent vacuole?

Answer 15

A space in the cytoplasm filled with cell sap

Question 16

What is the function of plasmids?

Answer 16

Free DNA strands

Question 17

Name four specialised cells.

Answer 17

Fat cell
Muscle cell
Goblet cell
Root hair cell

Question 18

Describe a fat cell

Answer 18

It has a small amount of cytoplasm and a large amount of fat. It has a small number of mitochondria so needs little energy. It can expand in order to fill up with fat.

Question 19

Describe a muscle cell

Answer 19

It has filaments which allow the cell to contract and the body to move. It has many mitochondria which release energy for contractions

Question 20

Describe a goblet cell

Answer 20

The shape increases surface area for mucus secretion. It contains vesicles for holding mucus.

Question 21

Describe a root hair cell

Answer 21

Root hairs increase surface area for water to move into cell. The permanent vacuole spreads up movement of water.

Question 22

What is aerobic respiration?

Answer 22

Yeast breaks down glucose to produce energy in plentiful oxygen

Question 23

What is anaerobic respiration?

Answer 23

Fermentation. Yeast breaks down glucose in the absence of oxygen

Question 24

What is diffusion?

Answer 24

The net movement of cells from an area of high concentration to an area of low concentration.

Question 25

What are the factors affecting the rate of diffusion?

Answer 25

Temperature Surface area Concentration

Question 26

What is the function of a glandular tissue?

Answer 26

Secretes substances

Question 27

What is the function of a epidermal tissue?

Answer 27

Cover and protect surfaces

Question 28

What is the function of a muscular tissue?

Answer 28

To contract to bring about movement

Question 29

What is the function of a epithelial tissue?

Answer 29

Covers body and internal organs

Question 30

What is the function of a mesophyll tissue?

Answer 30

Carry chloroplasts and photosynthesis

Question 31

What are the purposes of the xylem and phloem tissues?

Answer 31

Transport tissues | Carry water and dissolved mineral ions from the roots to the leaves and dissolved food from the leaves around the plant.

Question 32

In the stomach, what does a muscular tissue do?

Answer 32

Churns food and digestive juices together

Question 33

In the stomach, what does the glandular tissue do?

Answer 33

Produce digestive juices that break down food

Question 34

In the stomach, what does a epithelial tissue do?

Answer 34

Covers inside and outside of the organ

Question 35

What is digestion?

Answer 35

The process by which large insoluble molecules are turned into small soluble molecules in order to be absorbed by the stomach.

Question 36

Explain the process of digestion.

Answer 36

1) Mouth(via salivary glands and chewing) 2) Food swallowed, passes down oesophagus and into stomach. 3) Some digested in stomach 4) The rest digested in small intestine 5) Bile(liver) and digestive juices(pancreas) help to digest the food in the small intestine. 6) The undigested food passes into the large intestine. 7) Feaces produced are released by the anus.

Question 37

What is a cell?

Answer 37

Basic unit of living organisms.