Cells

Question 1

Name three different types of organs in our bodies.

Answer 1

Lung organ, the brain and the ovaries.

Question 2

Name three types of cells in our bodies.

Answer 2

Epithelial lung cells, reproductive cells and nerve cells.

Question 3

Name two systems that these organs and cells are a part of.

Answer 3

Respiratory system and the reproductive system.

Question 4

Name some types of microscopes.

Answer 4

Compound light microscope, the electron miscroscope, the Stereo microscope and the Scanning microscope.

Question 5

What does a compound light microscope do?

Answer 5

Is used to view thin specimens mounted on a slide. The specimens need to be thin so that light is allowed to pass through them to form 2D images.

Question 6

What does an electron microscope do?

Answer 6

They use a stream of electrons to produce an image.

Question 7

What does a Stereo microscope do?

Answer 7

They are used to view living or non living specimens. They provide an enlarges 3D image as light does not to be passed through them so do not need to be thin.

Question 8

What does a scanning microscope do?

Answer 8

They pass electrons over the surface of a specimen to give a 3D image.

Question 9

What does a transmission electron microscope do?

Answer 9

They pass electrons through a thing specimen to produce a cross sectional image.

Question 10

What is a cell wall?

Answer 10

A thick, rigid layer that surrounds the plant cell and provides support and structure.

Question 11

What is the cell membrane?

Answer 11

A barrier that surrounds the cell and controls the transport of materials into and out of the cell.

Question 12

What is a vacuole?

Answer 12

A large, fluid-filled space in a plant cell that helps keep its shape as well as storing nutrients.

Question 13

What is the nucleus?

Answer 13

Acts as the central storage area for genomic DNA.

Question 14

What is cytoplasm?

Answer 14

Fluid that fills the cell and suspends the various organelles.

Question 15

What is the mitochondria?

Answer 15

THE POWER HOUSE OF A CELL!!! It produces energy to fuel the cell’s activities.

Question 16

What is the chloroplast?

Answer 16

The food producer in a plant cell. It converts the light from the sun into energy using photosynthesis.

Question 17

What is respiration?

Answer 17

The process of which glucose + oxygen is turned into carbon dioxide and energy and water.

Question 18

What do the roots of a cell do?

Answer 18

They absorb water from the ground.

Question 19

What does the xylem cell do?

Answer 19

It carries the water to the leaves from the roots.

Question 20

What does the phloem cell do?

Answer 20

It carries food from the leaf to all parts of the plant.

Question 21

What does the stomate cell do?

Answer 21

Allows O2/CO2/H2O in and out of the plant.

Question 22

How do unicellular organisms reproduce?

Answer 22

Using binary fission.

Question 23

What is binary fission?

Answer 23

Cells divide into two, increasing the number of unicellular organisms and each is identical genetically.

Question 24

How do multicellular organisms reproduce?

Answer 24

By mitosis.

Question 25

What are all living things made up of?

Answer 25

Cells.

Question 26

Draw a diagram that describes asexual reproduction.

Answer 26

Um k

Question 27

What is the word equation for photosynthesis?

Answer 27

Carbon dioxide+ water - food + oxygen

Question 28

Describe some differences between plant and animal cells

Answer 28

Plant cells: tend to be larger and more regular in shape, are enclosed by a rigid cell wall, contain a vacuole and chloroplast.

Animal cells: have many different shapes and sizes, are enclosed by a cell membrane.

Question 29

How does one calculate the total magnification on a microscope?

Answer 29

Eyepiece magnification x object lens magnification

Question 30

What does one micrometer equal in miliometres?

Answer 30

0.001 mm

Question 31

What is the difference between low power and high power on a microscope?

Answer 31

Low power- field of view is larger but less detail can be seen

High power- field or view is smaller but more detail can be seen

Question 32

Why do we stain cells when viewing them under a microscope?

Answer 32

Because some cells are transparent and can’t be seen without a stain.

Question 33

What is a common stain used?

Answer 33

Iodine