Roundworms - Nematoda

Question 1

Nematodes have ________ body cavities

Answer 1

False

Question 2

What is the biggest type of Nematodea? (2)

Answer 2

1. Nematoda
2. Nematomorpha

Question 3

What are the unusual types (ocean dwellers)

Answer 3

1. Kinorhyncha
2. Priapulida
   3.Loricifera

Question 4

What habitats are Nematodes found in?

Answer 4

1. Marine
2. Freshwater
3. Interstitial
4. Endophytic
5. Endozoic

Question 5

T/F: Roundworms have a muscular gut that helps them push food through it

Answer 5

True!

Question 6

T/F: Roundworms have a short, muscular intestine

Answer 6

False

Question 7

What is the purpose of the intestine?

Answer 7

Absorption

Question 8

T/F: Roundworms do not have anuses

Answer 8

False

Question 9

What is the body wall made out of?

Answer 9

A collagenous, non-cellular cuticle

Question 10

What does the cuticle secrete?

Answer 10

The syncytial hypodermis

Question 11

T/F: Roundworms have a longitudinal muscle but no circular muscle

Answer 11

True

Question 12

Do nematodes have a rigid skeletal structure?

Answer 12

No

Question 13

T/F: The cuticle of a worm is designed to be strong, elastic, and non-stretchy

Answer 13

True

Question 14

FITB: Internal turgor pressure is useful for _______ and ____________ support

Answer 14

1. Movement
2. Structural

Question 15

What is the main function of longitudinal muscles?

Answer 15

To pull one side of the worm (which increases the internal turgor pressure) which allows the worm to be bendy like a spring

Question 16

T/F: When muscles relax, pressure (fluid) does not straighten out the worm

Answer 16

False

Question 17

How do worms control their overall internal pressure?

Answer 17

Osmoregulation

Question 18

What is a key structure in a nematodes nervous system?

Answer 18

Dorsal and ventral nerve cords

Question 19

Nematodes have ___ lateral excretory ducts & gland cells

Answer 19

2

Question 20

T/F: Nematodes have protonephridia and flame cells

Answer 20

False; they don’t have either

Question 21

T/F: Roundworms have circulatory and respiratory systems

Answer 21

False; they are very simple animals (have a body cavity instead)

Question 22

Nematode’s body size and shape allows them to perform which process?

Answer 22

Diffusion

Question 23

Are nematodes monoecious or dioecious?

Answer 23

Dioecious

Question 24

Do nematodes complete fertilization through external or internal fertilization?

Answer 24

Internal; remember the diagram

Question 25

This or that: In regards to the reproductive system, which sex type has posterior copulatory spicules?

Answer 25

Male

Question 26

T/F: Copulatory spicules are true intromittant organs

Answer 26

False

Question 27

Is sperm actively transported during reproduction?

Answer 27

No

Question 28

T/F: Sperm are ameboid

Answer 28

True

Question 29

T/F: The male has a combined ovary and vitelline gland with a genital pore for copulation and egg release

Answer 29

False; the female has all of these parts

Question 30

In reproduction terms, how many "juvenile stages" are gone through with 4 cuticle molts?

Answer 30

4

Question 31

What is the name of the most famous nematode?

Answer 31

Eutely

Question 32

FITB: Eutely nematodes are composed of the same number of ______ in all individuals in a species

Answer 32

Cells

Question 33

Are most animals eutelic?

Answer 33

No

Question 34

What is the scientific name of Eutely?

Answer 34

Caenorhabditis elegans

Question 35

Parasitic nematodes include __________, _________, and ___________ | HPW

Answer 35

1. Hookworm 2. Pinworm 3. Whipworm

Question 36

T/F: Ringworm is a fungus

Answer 36

True

Question 37

What is the name of the intestinal parasites of mammals?

Answer 37

Ascaris

Question 38

What ascarid is commonly found in dogs and cats?

Answer 38

Toxocara

Question 39

Toxocara is transmitted when juveniles migrate from their host to the host's __________

Answer 39

Offspring

Question 40

T/F: Toxocara crawls under your skin

Answer 40

True

Question 41

Can Toxocara be transmitted to humans causing visceral larva migrans?

Answer 41

Yes

Question 42

Can Toxocara finish its lifecycle in humans?

Answer 42

No

Question 43

What 2 genera are included in Hookworms?

Answer 43

1. Necator 2. Anclyostoma

Question 44

This or that: Hookworms have a distinctive anterior/posterior hook shape

Answer 44

Anterior

Question 45

T/F: Hookworms can be transmitted orally or burrowing into human skin

Answer 45

True

Question 46

T/F: Hookworms are not a migrating species in humans or other hosts

Answer 46

False

Question 47

Hookworms migrate from the bloodstream to which other part of the body in humans?

Answer 47

The gut

Question 48

Hookworms are ______-suckers in the gut

Answer 48

Blood

Question 49

T/F: Hookworms can cause anemia in humans

Answer 49

True

Question 50

What is the causative agent of trichinosis?

Answer 50

Trichinella spiralis

Question 51

What is the mode of transmission for Trichinella?

Answer 51

Eating undercooked pork/wild game with encysted larvae inside

Question 52

T/F: Trichinella juveniles are not intracellular parasites that can redirect gene expression

Answer 52

False; they are and can!

Question 53

Are pinworms dangerous?

Answer 53

No, just a nuisance

Question 54

T/F: Children are prone to get pinworms

Answer 54

True

Question 55

FITB: Dracunculus is a ________ nematode that develops just below the skin

Answer 55

African