Arthropods

Question 1

What does ‘Arthro’ mean?

Answer 1

Jointed

Question 2

What does ‘Poda’ mean?

Answer 2

Legs

Question 3

What percentage of the world’s animal species do arthropods comprise?

Answer 3

About 86%

Question 4

What type of light can arthropods see?

Answer 4

Ultraviolet light

Question 5

What is the exoskeleton of arthropods made of?

Answer 5

Chitin

Question 6

List three ways arthropods differ in terms of diversity.

Answer 6

• Size
• Shape
• Color

Question 7

What are the general features of arthropods?

Answer 7

• Segmented body
• Paired segmented appendages
• Bilateral symmetry
• Chitinous exoskeleton
• Tubular alimentary canal with mouth and anus
• Open circulatory system
• Body cavity or coelom
• Nervous system of anterior ganglia
• Striated muscles
• Respiration by gills or tracheae

Question 8

What type of metamorphosis do some arthropods undergo?

Answer 8

Incomplete (hemimetabolous) and complete (holometabolous)

Question 9

Fill in the blank: The nymph is morphologically similar to the adult in _______ metamorphosis.

Answer 9

incomplete

Question 10

What are the four stages of complete metamorphosis?

Answer 10

• Egg
• Larva
• Pupa
• Adult

Question 11

How do arthropods influence human health directly?

Answer 11

• Nuisance
• Injury
• Disease
• Allergy

Question 12

What are two types of transmission by arthropods?

Answer 12

• Mechanical transmission
• Biological transmission

Question 13

What does mechanical transmission involve?

Answer 13

Carrying pathogens without development or multiplication.

Question 14

What is developmental biological transmission?

Answer 14

Pathogen stage changes but the number remains constant.

Question 15

What is propagative biological transmission?

Answer 15

Number of pathogens increases while the developmental stage remains constant.

Question 16

What is transovarian transmission?

Answer 16

Pathogens passed to developmental stages usually eggs.

Question 17

What is the class of arthropods that includes lice, fleas, and mosquitoes?

Answer 17

Class Insecta

Question 18

What distinguishes Class Chilopoda from Class Diplopoda?

Answer 18

Chilopoda have one pair of legs per segment; Diplopoda have two pairs.

Question 19

What are the three most important classes of arthropods?

Answer 19

• Class Crustacea
• Class Arachnida
• Class Insecta

Question 20

What is a key characteristic of Class Crustacea?

Answer 20

They have two pairs of antennae.

Question 21

What is the medical importance of Cyclops?

Answer 21

Intermediate hosts of fish tapeworm and Guinea worm.

Question 22

What is the difference between insects and arachnids in terms of body regions?

Answer 22

Insects have 3 body regions; arachnids have 2.

Question 23

True or False: Mosquitoes belong to Class Arachnida.

Answer 23

False

Question 24

What disease is transmitted by Anopheles mosquitoes?

Answer 24

Malaria

Question 25

What is the vector for Yellow Fever?

Answer 25

Aedes aegypti

Question 26

What is the common vector for Lyme Disease?

Answer 26

Ticks (Ixodes genus)

Question 27

What type of tick is known for feeding multiple times?

Answer 27

Soft ticks

Question 28

What are some control measures for preventing arthropod-human contact?

Answer 28

* Physical measures * Chemical measures * Biological measures

Question 29

Fill in the blank: Mosquitoes are important disease ______.

Answer 29

vectors

Question 30

What is the life cycle of a triatomine bug related to?

Answer 30

Chagas disease

Question 31

What type of metamorphosis do ticks undergo?

Answer 31

Hemimetabolous metamorphosis