Term 1 Lesson 1: cells

Question 1

What are cells?

Answer 1

Building blocks of a human

Question 2

What is tissue?

Answer 2

group of similar cells working together to perform a function.

Question 3

Organ

Answer 3

What is it called when a collection of different tissues working together to perform a function?

Question 4

What is a system?

Answer 4

Multiple organs working together.

Question 5

Name some of the systems in the body?

Answer 5

-reproductive system
-cardiovascular system
-nervous system
- digestive system
- The muscular system
-Endocrine system
-The skeletal system
-Urinary system
- Respiratory system

Question 6

What is an unspecialised cell?

Answer 6

When cells don’t perform a specific job

Question 7

Can you name the organelles that are part of an unspecialised cell?

Answer 7

-Nucleus
-Mitrochondria
-Ribosomes
-Endoplasmic reticulum (ER)
-Cell membrane
-Cytoplasm

Question 8

Can you draw and label an animal cell

Answer 8

Question 9

Nucleus

Answer 9

Contains genetic material that controls the activities of the cell.

Question 10

Mitrochondria

Answer 10

Releases the energy stored by glucose for respiration.

Question 11

Ribosomes

Answer 11

site of protein synthesis

Question 12

Endoplasmic Reticulum

Answer 12

Network of membranes, covered in ribosomes, transport proteins and other materials around the cell.

Question 13

Cell membrane

Answer 13

Selectively and partially permeable. Controls movement in and out of the cell.

Question 14

Cytoplasm

Answer 14

Jelly like substance where chemical reactions take place.

Question 15

Cells are very small. Name an instrument we could use to hep us see them?

Answer 15

Microscope

Question 16

What are the two different types of microscopes?

Answer 16

light & electron

Question 17

Which microscope is more powerful, a light or electron?

Answer 17

Electron

Question 18

Typical magnification for electron microscopes

Answer 18

up to x 50,000

Question 19

Typical magnification for light microscopes

Answer 19

x 400

Question 20

Disadvantages of electron microscopes

Answer 20

• expensive
• large
• require training to use
• only dead specimens can be observed

Question 21

Disadvantage of light microscopes

Answer 21

• limited resolution
• limited magnification

Question 22

Advantages of light microscopes

Answer 22

• portable
• easy to use
• inexpensive
• observe dead and living organisms

Question 23

Give two reasons for using a coverslip when looking at a slide under the microscope.

Answer 23

to keep specimen flat
- to retain liquid under it to prevent specimen drying out

Question 24

What is an organelle?

Answer 24

A subcellular structure that fulfills a particular function

Question 25

Why do cells need to be stained prior to microscopy?

Answer 25

• highlight different cellular structures
• highlight metabolic processes
• differentiate between living and dead cells

Question 26

Wat structures/organelles can you see with an electron microscope but not a light microscope?

Answer 26

• endoplasmic Reticulum
• mitochondria
  -ribosomes