Arthropods Flashcards
(54 cards)
what is the most diverse eukaryotic group?
Anthropods
Dysticus is a
predaceous diving beetle
how do Dytisucs breathe?
adults collect air under wings and use this to breathe underwater
What is the structure of an Arthropod?
- Reduced segmentation
- body regions
- jointed appendages
What kind of skeleton do Arthropods have?
rigid exoskeleton
Arthropods are …
ecdyosozon (which means they are moulting animals)
what does the rigid exoskeleton of a Arthropod cover?
all external surfaces, digestive tract and the tracheae
What are the advantages of having a rigid exoskeleton?
Physical support
What are the advantages of having a rigid exoskeleton?
place for muscle attachment
What are the advantages of having a rigid exoskeleton?
physical protection from abrasion, predatation, parasite entry and desiccation
What are the advantages of having a rigid exoskeleton?
Location of pigments - camouflage
What are the advantages of having a rigid exoskeleton?
jointed appendages and exoskeleton allow faster locomotion
What are the advantages of having a rigid exoskeleton?
Opportunity to change morphology between larval and adult stages
Why is it important to change between life stages?
Less competition within the species
What the disadvantages of having a rigid exoskeleton
Infelixble and heavy
What the disadvantages of having a rigid exoskeleton
continuous growth in size is not possible
What the disadvantages of having a rigid exoskeleton
requires energy to form and shed
What the disadvantages of having a rigid exoskeleton
prevents the use of cilia as effectors
What the disadvantages of having a rigid exoskeleton
respiration through the skin is not possible
How do arthropods breathe?
through spiracles - pores and tracheae - tubes
what needs to be removed before myosin can bind?
tropomyosin
what spikes drive muscle contractions?
motor neurons
what causes the contraction of the sarcomere?
sliding of thick filaments between thin filaments
Name the 3 types of skeletons
- hydrostatic skeleton
- exoskeleton
- endoskeleton