Biology

Question 1

What are two types of epithelial tissue

Answer 1

Ciliated columnar
Squamous epithelium

Question 2

Where is columnar epithelium found

Answer 2

Trachea and bronchi

Question 3

What is the structure of squamous epithelium

Answer 3

Flat and thin with egg shaped nuclei

Question 4

What is the structure of ciliated columnar

Answer 4

Very tall in shape, set in columns

Question 5

What is COPD

Answer 5

Chronic Obstructive Pulmonary diseases

Question 6

What are the effects of COPD on the lungs

Answer 6

Thick narrow bronchioles with excess mucus
Destruction of alveolar walls

Question 7

What is magnification

Answer 7

This is how many times bigger the image is than the object

Question 8

What is the calculation to calculate maginfication

Answer 8

Image size divided by actual image

Question 9

What is the equation to calculate image size

Answer 9

Actual size times magnification

Question 10

What are the two types of electron Microscopes

Answer 10

Transmission and scanning electron

Question 11

True or false produce black and white images?

Answer 11

True

Question 12

True or false light microscopes produce colourful images?

Answer 12

True

Question 13

Which microscope out of light and electron produces higher magnification and resolution?

Answer 13

Electron

Question 14

What is the magnification of electron microscope?

Answer 14

2,000,000

Question 15

What is resolution

Answer 15

Being able to distinguish between the points that are very close

Question 16

What are the advantages of electron microscopes?

Answer 16

Much greater than light microscopes
Being able to see the structure in the cells
Has a greater resolution than light microscopes

Question 17

What are the disadvantages of electron microscopes

Answer 17

They are much more expensive
Can only produce black and white images
You can only examine dead material

Question 18

What are the advantages of light microscopes?

Answer 18

Very affordable
Easy to use
Very portable
Can produce coloured images
Very cheap

Question 19

What are the disadvantages of light microscopes?

Answer 19

Has a low resolution
Has a low magnification

Question 20

What is the nervous system made up of

Answer 20

The periphal nervous system
The central nervous system

Question 21

What is the function of the node of ranvier

Answer 21

Allows the electrical impulses to keep up speed

Question 22

What is the function of the Schwann cells

Answer 22

Produces the myelin sheath

Question 23

What are neurones

Answer 23

They are cells which carry electrical impulses

Question 24

What are the three types of neurone

Answer 24

Motor
Sensory
Relay

Question 25

What are some of the differences in myelinated and non myelinated nerves

Answer 25

Myelinated nerves have a larger diameter than non myelinated Non myelinated nerves have slower impulses than myelinated nerves Non myelinated nerves don’t have a myelin sheath while myelinated nerves do

Question 26

What is the function of the motor neurone

Answer 26

Transmits impulses to the effector

Question 27

What are the two protein filaments found in muscle cells

Answer 27

Actin Myosin

Question 28

What is the gap between two neuroses called

Answer 28

Synapse

Question 29

What ions enter the cell at the synapse

Answer 29

Calcium ions

Question 30

What is the membrane potential while at rest

Answer 30

-70mv

Question 31

What is the membrane potential when it rises

Answer 31

-55mv